Mountain Avenue Animal Hospital

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<title>Mountain Avenue Animal Hospital · reviews &amp; AI Score · Local AI Registry</title>
<meta name="description" content="Mountain Avenue Animal Hospital is a veterinarian in Ontario, CA. It's rated 4.6 on Google from 338 reviews. Named by 0 of 1 AI assistants.">
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<meta property="og:title" content="Mountain Avenue Animal Hospital · AI Score 47 of 100 · Fair">
<meta property="og:description" content="Mountain Avenue Animal Hospital is a veterinarian in Ontario, CA. It's rated 4.6 on Google from 338 reviews. Named by 0 of 1 AI assistants.">
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# Local AI Registry

> The public record of what AI assistants say about local businesses. Every entry checked, scored, and kept current.

Local AI Registry is the editorial, never-sponsored record of what local
businesses are known for, and whether AI assistants actually recommend them.
We score every local business the same way and rank them: website, reviews,
AI visibility, and more. Eight signals, one number from 0 to 100. The heaviest
is whether AI can retrieve you at all.

## Read these first

- [Local AI Registry](https://localairegistry.com): AI assistants now decide which local business to recommend.
- [Methodology](https://localairegistry.com/methodology): Eight signals, one number from 0 to 100.
- [Leaderboards](https://localairegistry.com/leaderboards): Browse AI Score leaderboards by state, city, and category.
- [About](https://localairegistry.com/about): The honest record of who AI recommends.
- [Pricing](https://localairegistry.com/pricing): Four levels of presence, from a free registry entry to being the answer AI gives first in your market.
- [Journal](https://localairegistry.com/journal): How AI assistants decide which local businesses to recommend, and what owners can do about it.

## Business pages

- [Sitemap](https://localairegistry.com/sitemap.xml): Every business page on the registry, with the day each was last updated.
- Every business page has a markdown copy at its own address with `.md` on the end. The copy holds the same facts, marks and sources as the page, in the page's order: the photos with their captions, the team and their licenses, the reviews summary, and the questions locals asked with the replies. The page names it in its head and its HTTP `Link` header.

# Mountain Avenue Animal Hospital, Ontario: a veterinarian in Ontario (2026 guide)

Source: Local AI Registry, https://localairegistry.com/biz/ca/ontario/mountain-avenue-animal-hospital-ontario-ca. Free to reuse with a link back.

By Steve Lee, founder and CEO of Local AI Registry. Fact-checked against 13 sources. Updated 2026-09-03. Owner review: not yet.

Canonical: https://localairegistry.com/biz/ca/ontario/mountain-avenue-animal-hospital-ontario-ca

## Photos

- ![Photo 1](https://localairegistry.com/api/photo?src=https%3A%2F%2Fseoaesthetic-assets.sfo3.cdn.digitaloceanspaces.com%2Fphotos%2Fcmtm58l9d0dh2ye8p0wilrmew%2F0.jpg)
- ![Photo 2](https://localairegistry.com/api/photo?src=https%3A%2F%2Fseoaesthetic-assets.sfo3.cdn.digitaloceanspaces.com%2Fphotos%2Fcmtm58l9d0dh2ye8p0wilrmew%2F1.jpg)
- ![Photo 3](https://localairegistry.com/api/photo?src=https%3A%2F%2Fseoaesthetic-assets.sfo3.cdn.digitaloceanspaces.com%2Fphotos%2Fcmtm58l9d0dh2ye8p0wilrmew%2F2.jpg)
- ![Photo 4](https://localairegistry.com/api/photo?src=https%3A%2F%2Fseoaesthetic-assets.sfo3.cdn.digitaloceanspaces.com%2Fphotos%2Fcmtm58l9d0dh2ye8p0wilrmew%2F3.jpg)
- ![Photo 5](https://localairegistry.com/api/photo?src=https%3A%2F%2Fseoaesthetic-assets.sfo3.cdn.digitaloceanspaces.com%2Fphotos%2Fcmtm58l9d0dh2ye8p0wilrmew%2F4.jpg)


## In short

Mountain Avenue Animal Hospital is a veterinarian in Ontario, CA. Its AI Score is 47 of 100, which is fair.

Every fact on this page carries one of three marks: Confirmed (from their website, Google Business Profile, review sites, licensing boards, or measured by Local AI Registry), Visitor submitted (added by a person, with a date and how they know), or AI guess (what AI engines like ChatGPT are saying, not confirmed by anyone). Every mark points to a reference at the end of this page.


## Key facts

| Fact | Value |
| --- | --- |
| Type | Veterinarian |
| Address | 1155 N Mountain Ave, Ontario, CA 91762, USA |
| Hours | Mon to Fri 8 AM to 6 PM · Sat 8 AM to 1 PM · Closed Sun |
| Phone | (909) 986-4548 |
| Medical director | Nothing found |
| Rating | 4.6 across 338 reviews on Google |
| Known for | Mountain Avenue Animal Hospital is best known for its compassionate spay and neuter services and trusted veterinary care, making it a reliable choice for pet owners in Ontario. |
| Prices | Nothing found |
| Quietest time | Saturday |
| Parking | Nothing found |
| Last verified | September 19, 2026, 1:15 PM |


## All the details

Every row is something the owner can add or correct. Each one is marked Confirmed, Visitor submitted or AI guess, with where it came from.

| Group | Fact | Value | Mark | Evidence |
| --- | --- | --- | --- | --- |
| Location info | Name | Mountain Avenue Animal Hospital | Confirmed | Google Business Profile, checked Sep 3, 2026 |
| Location info | Address | 1155 N Mountain Ave, Ontario, CA 91762, USA | Confirmed | Google Business Profile, checked Sep 3, 2026 |
| Location info | Phone | (909) 986-4548 | Confirmed | Google Business Profile, checked Sep 3, 2026 |
| Location info | Hours | Mon to Fri 8:00 AM to 6:00 PM · Sat 8:00 AM to 1:00 PM · Sun Closed | Confirmed | Google Business Profile, checked Sep 3, 2026 |
| Location info | Description | Mountain Avenue Animal Hospital provides quality veterinary care for dogs and cats in Ontario, CA and the surrounding communities. Our hospital boasts superb veterinarians and caring support staff that are dedicated to our patients, clients, and community. | Confirmed | Google Business Profile, checked Sep 3, 2026 |
| Hours | Monday | 8:00 AM to 6:00 PM | Confirmed | Google Business Profile, checked Sep 3, 2026 |
| Hours | Tuesday | 8:00 AM to 6:00 PM | Confirmed | Google Business Profile, checked Sep 3, 2026 |
| Hours | Wednesday | 8:00 AM to 6:00 PM | Confirmed | Google Business Profile, checked Sep 3, 2026 |
| Hours | Thursday | 8:00 AM to 6:00 PM | Confirmed | Google Business Profile, checked Sep 3, 2026 |
| Hours | Friday | 8:00 AM to 6:00 PM | Confirmed | Google Business Profile, checked Sep 3, 2026 |
| Hours | Saturday | 8:00 AM to 1:00 PM | Confirmed | Google Business Profile, checked Sep 3, 2026 |
| Hours | Sunday | Closed | Confirmed | Google Business Profile, checked Sep 3, 2026 |
| Services | Service | Advanced soft tissue surgery | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Boarding | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Diagnostics | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Modal title | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Orthopedic pet surgery | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Pet grooming | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Pet health certificates | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Pet laser therapy | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Pet microchipping | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Pet nutrition | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Pet portal | Confirmed | Business website, checked Sep 19, 2026 |
| Services | Service | Surgical procedures | Confirmed | Business website, checked Sep 19, 2026 |
| Links | Website | http://mountainaveanimalhospital.com/ | Confirmed | Google Business Profile, checked Sep 3, 2026 |


## Services and prices

These are the 12 services Mountain Avenue Animal Hospital offers, with the price where we have one and where it came from.

| Service | Price | Price mark | Price evidence | Service mark |
| --- | --- | --- | --- | --- |
| Advanced soft tissue surgery |  |  |  | Confirmed |
| Boarding |  |  |  | Confirmed |
| Diagnostics |  |  |  | Confirmed |
| Pet health certificates |  |  |  | Confirmed |
| Pet grooming |  |  |  | Confirmed |
| Pet microchipping |  |  |  | Confirmed |
| Modal title |  |  |  | Confirmed |
| Pet laser therapy |  |  |  | Confirmed |
| Orthopedic pet surgery |  |  |  | Confirmed |
| Pet nutrition |  |  |  | Confirmed |
| Surgical procedures |  |  |  | Confirmed |
| Pet portal |  |  |  | Confirmed |


### Known for

Mountain Avenue Animal Hospital is best known for its compassionate spay and neuter services and trusted veterinary care, making it a reliable choice for pet owners in Ontario.


## The team

Nothing found


## Visiting Mountain Avenue Animal Hospital

Address: 1155 N Mountain Ave, Ontario, CA 91762, USA. Phone: (909) 986-4548. Hours: Mon to Fri 8 AM to 6 PM · Sat 8 AM to 1 PM · Closed Sun. (Confirmed, Google Business Profile, checked September 3, 2026 at 4:15 PM.)


### Location info from Google Business Profile

Business description, written by Mountain Avenue Animal Hospital on its Google Business Profile: "Mountain Avenue Animal Hospital provides quality veterinary care for dogs and cats in Ontario, CA and the surrounding communities. Our hospital boasts superb veterinarians and caring support staff that are dedicated to our patients, clients, and community."


### When to go

Quietest day: Saturday. Busiest day: Monday. From the popular times on its Google listing.


### Parking and getting in

Nothing found


### Nearby

| Place | Type | Distance |
| --- | --- | --- |
| Joanne's Cafe | Diner | 1 min walk |
| Pizza Hut | Pizza delivery | 2 min walk |
| Tacos Mister Pancho | Mexican restaurant | 2 min walk |
| Pollo Campero | Chicken restaurant | 2 min walk |
| Mountain @ 4th Street | Bus stop | 3 min walk |
| Mountain @ 5th Street | Bus stop | 3 min walk |


## Reputation

4.6 average across 338 reviews: Google 25. (Confirmed, read September 3, 2026.)

The hospital is noted for its compassionate staff but faces criticism for high costs and inconsistent care quality. (AI guess, from 338 reviews.)


### What people like

- Handwritten condolence cards from staff
- Availability of appointments


### What people do not like

- High treatment costs
- Concerns about misdiagnosis
- Long waits for appointments


### Press

No press story about Mountain Avenue Animal Hospital found yet.


### Awards

None named yet.


### Directories

Directory listings not read yet.


## Recent updates from Mountain Avenue Animal Hospital

Mountain Avenue Animal Hospital hasn't posted an update here yet.


## Questions people ask


### best veterinarian in Ontario

No answer yet


### do they do payment plans at Mountain Avenue Animal Hospital?

No answer yet


### worth it or not, what do the regulars say

No answer yet


### prices round here, anyone got a number

No answer yet


### planning a Sunday visit, is that a wasted trip

No answer yet


### what do I actually do when I get here?

No answer yet


### Are the hours on Google right for Mountain Avenue Animal Hospital?

No answer yet


### who is actually holding the needle at Mountain Avenue Animal Hospital?

No answer yet


### last update from here was when?

No answer yet


### how rough is the follow up at Mountain Avenue Animal Hospital?

No answer yet


### Is numbing included here or is it extra?

No answer yet


### never been to Mountain Avenue Animal Hospital in Ontario, how does it go?

No answer yet


### consult at Mountain Avenue Animal Hospital, what do I need to bring?

No answer yet


### trying to avoid the rush, which day is quiet

No answer yet


### Calling this place, or is there a better way?

No answer yet


### bad experiences at Mountain Avenue Animal Hospital, anyone?

No answer yet


### anyone been to both here and VCA California?

No answer yet


## What AI gets wrong about Mountain Avenue Animal Hospital

We ask ChatGPT about Mountain Avenue Animal Hospital. These are the answers that disagree with the record.

ChatGPT, read by Local AI Registry on Sep 3, 2026.

No capture has disagreed with the record yet.


## The AI Score: 47 of 100

The AI Score measures how likely AI engines are to recommend a business, and how accurately. Veterinarians on the registry run 21 to 70. Fair starts at 45, good at 65. Mountain Avenue Animal Hospital scores 47. The same method scores every business on the registry.

| Signal | Weight | Score | What it measures | Mountain Avenue Animal Hospital |
| --- | --- | --- | --- | --- |
| Retrieval grounding | 26 | 75 | Whether you appear in the ranked results AI retrieves and cites: AI-Overview citations, organic top-10 for your money queries, and the Bing index ChatGPT leans on. | Good |
| Off-property attestation | 20 | 40 | Volume and consistency of what others say about you: YouTube mentions, branded web mentions, third-party “best-of” lists. The cause of retrievability. | Poor |
| AI visibility | 14 | 0 | Whether ChatGPT, Gemini, Perplexity, and AI Overviews name you, and whether they name you for the right service. | Named in 0 of 1 answer that recommended anyone. |
| Reviews & response | 12 | 92 | The star average is only one input. We also read volume, velocity, the specificity of review language, and response cadence. Specific reviews are what AI quotes verbatim. | Good |
| Backlink & citation authority | 8 | 55 | Domain authority and editorial quality of the sources that attest to you. | Fair |
| Google Business Profile | 8 | 90 | Required and recommended fields; update cadence. The listing AI pulls from first. | Good |
| Speed & mobile | 7 | Not read yet | Core Web Vitals at the 75th percentile, on a real phone. | No reading has come back for this signal yet. |
| Content freshness & schema | 5 | 59 | Crawl recency, intent alignment, valid JSON-LD, canonicals. | Fair |

Full method: https://localairegistry.com/methodology


## How AI decides what to tell you about a veterinarian

When you ask ChatGPT, Gemini or Google for a med spa, the AI does not visit each business. It reads what is already written about it: the business website, its Google Business Profile, review sites like Yelp and RealSelf, news stories, licensing boards and directories like this one. Then it repeats what those sources agree on.

That is why AI gets small facts wrong. If Yelp says a place is open Mondays and the website says it is not, the AI has to pick one. The table above shows the answers that disagree with the record today.

The more sources agree, and the more specific they are, the more confidently AI recommends a business. A review that says "the nurse did half a syringe in my lips and it looks natural" is far more useful to an AI than one that says "great place."


## How to choose a veterinarian in California, with or without AI

A few checks take ten minutes and matter more than any rating. This is general information, not medical advice.

- Look up every injector. Doctors are listed by the California medical board, and nurses and nurse practitioners by its nursing board. Both lookups are free.
- Ask who does the injections, and check that person's license.
- Ask for the price per unit of Botox and per syringe of filler, not per area.
- Read reviews that name a provider and a treatment. Vague praise is easy to fake.
- Check that the hours and phone number match on Google, Yelp and the website. Mismatches are how people end up at a locked door.
- Ask whether they dissolve filler and when they would tell you not to add more.


## How to read the marks on this page

- Confirmed (solid circle): from a known source. The business website, its Google Business Profile, review sites like Yelp, Healthgrades and RealSelf, a licensing board, or measured by Local AI Registry.
- Visitor submitted (hollow circle): added or corrected by a person, with the date and how they know, like a phone call or a visit.
- AI guess (hollow triangle): what AI engines are saying right now. Nobody has confirmed it.


## About the author

Steve Lee is the founder and CEO of Local AI Registry and sets its editorial standards. He is a former Google executive in Search and a former Microsoft executive, with more than 20 years in digital: search, local discovery, and how people find businesses online. He is based in Irvine.

- Expertise: search at Google and Microsoft, AI search, answer engine optimization, generative engine optimization, local SEO, structured data and entity mapping.
- Industry: medical aesthetics, injectables, med spa operations and marketing.
- Disclosure: Local AI Registry sells services to business owners, including Mountain Avenue Animal Hospital if it claims this page. That does not change what this page says. Every fact carries its source.


## Entity map

Every person, place, organization and treatment named on this page, with a stable ID and a public reference. The JSON-LD below connects them to each other.

| Entity | Type | ID on this page | Same as | Relationship to Mountain Avenue Animal Hospital |
| --- | --- | --- | --- | --- |
| Mountain Avenue Animal Hospital | MedicalBusiness | #business | http://mountainaveanimalhospital.com/ | Subject of this page |
| Ontario, California | City | #city | Nothing found | City Mountain Avenue Animal Hospital is in |
| Local AI Registry | Organization | #publisher | https://localairegistry.com | Publisher of this page |
| Steve Lee | Person | #author | https://localairegistry.com/team | Author of this page |


## Topical map

Where this page sits in the registry. It's one profile among the veterinarians in Ontario, linked to the lists and towns around it.


### Lists

- Best veterinarians in Ontario: https://localairegistry.com/leaderboards/ca/ontario/veterinarian
- Best businesses in Ontario: https://localairegistry.com/leaderboards/ca/ontario


### Nearby

- /los-angeles: https://localairegistry.com/leaderboards/ca/los-angeles
- /san-francisco: https://localairegistry.com/leaderboards/ca/san-francisco
- /san-jose: https://localairegistry.com/leaderboards/ca/san-jose
- /san-diego: https://localairegistry.com/leaderboards/ca/san-diego
- /irvine: https://localairegistry.com/leaderboards/ca/irvine
- /fresno: https://localairegistry.com/leaderboards/ca/fresno


### Every list

- Every leaderboard in California: https://localairegistry.com/leaderboards/ca


## Frequently asked questions


### What is AI search optimization for local business?

Getting a business named when a neighbor asks ChatGPT, Gemini, or Perplexity for a recommendation. Some call it AI SEO, some call it generative engine optimization. Traditional SEO fights for ten blue links; this fights for the one answer an assistant says out loud. The AI Score on this page measures the eight signals that drive it.


### What is Local AI Registry?

The public record of how AI sees local business. We score every business we list by one published method, we keep the questions people ask about it in one place, and we never sell rank. Looking up any business here is free.


### How does this page help a business get recommended by AI?

Assistants read public pages before they answer. This one states what the business does, what people ask about it, and what the Record answers, in one place a machine can read. Correcting what is wrong here changes what an assistant repeats next.


### Who writes the answers here?

Registry AI writes the first answer under every question, from the Record and the public sources named beneath it. Neighbors write the rest under pseudonyms. A registered owner can reply as the business, and their reply says so.


### I own Mountain Avenue Animal Hospital. How do I fix something or rank higher?

Register the page. It is free, it takes about five minutes, and it lets you correct the Record and reply as the business. Nothing on this page is for sale, so the only thing that moves the score is the work.


## References


### Sources cited

- [1] Google Business Profile, https://www.google.com/maps/place/?q=place_id:ChIJ_Zc8SNwzw4AROuqPkGiiOJ0 (accessed Sep 3, 2026)
- [2] mountainaveanimalhospital.com, https://mountainaveanimalhospital.com/services/pet-soft-tissue-surgery (accessed Sep 19, 2026)
- [3] mountainaveanimalhospital.com, https://mountainaveanimalhospital.com/services/pet-boarding (accessed Sep 19, 2026)
- [4] mountainaveanimalhospital.com, https://mountainaveanimalhospital.com/services/pet-diagnostics (accessed Sep 19, 2026)
- [5] mountainaveanimalhospital.com, https://mountainaveanimalhospital.com/services (accessed Sep 19, 2026)
- [6] mountainaveanimalhospital.com, https://mountainaveanimalhospital.com/services/orthopedic-pet-surgery (accessed Sep 19, 2026)
- [7] mountainaveanimalhospital.com, https://mountainaveanimalhospital.com/services/pet-grooming (accessed Sep 19, 2026)
- [8] mountainaveanimalhospital.com, https://mountainaveanimalhospital.com/services/pet-health-certificates (accessed Sep 19, 2026)
- [9] mountainaveanimalhospital.com, https://mountainaveanimalhospital.com/services/pet-laser-therapy (accessed Sep 19, 2026)
- [10] mountainaveanimalhospital.com, https://mountainaveanimalhospital.com/services/pet-microchipping (accessed Sep 19, 2026)
- [11] mountainaveanimalhospital.com, https://mountainaveanimalhospital.com/services/veterinary-nutritionist (accessed Sep 19, 2026)
- [12] mountainaveanimalhospital.com, https://mountainaveanimalhospital.com/pet-portal (accessed Sep 19, 2026)
- [13] mountainaveanimalhospital.com, https://mountainaveanimalhospital.com/services/vet-surgery (accessed Sep 19, 2026)