How often is Purina Pro Plan mentioned?

Purina Pro Plan appeared in 9 usable answers in this snapshot. A mention is not necessarily a recommendation.

Which brands appear most in the budget answers?

Diamond Naturals appeared in 4 of 4 usable budget answers. This measures mentions, not verified price or budget compliance.

Does this benchmark prove AI recommendations are biased?

No. Differences in answers do not establish bias or prove that advertising or commercial integrations caused a recommendation. Model, tier and collection changes can also affect comparisons.

How was this dog food snapshot collected?

3 prompt types were recorded across the participating services. 12 of 12 captured response records contain usable answers, from ChatGPT, Claude, Gemini, Perplexity. Brand mentions and recorded ranks are measured separately. Unavailable and explicitly excluded answers do not contribute to brand analysis.

Evergreen monthly benchmark — Apr 20

Dog Food

Research by Robert Hu · Published by RecoScope · Collected Apr 20, 2026

Usable answers: 12/12
Models: 4
Prompt types: 3

Included: ChatGPT, Claude, Gemini, Perplexity

Report history · Apr 20 selected · 10 snapshots

Key takeaway

The dog food category has a clear "Big Three" of AI-recommended brands — Purina Pro Plan, Hills Science Diet, Royal Canin — which every model treats as the WSAVA-compliant gold standard. Boutique and premium brands fight for visibility outside this core, and only appear in specific models. ChatGPT's commerce-formatted output and unique inclusion of Pedigree/Rachael Ray Nutrish suggests commerce-influence bias. Meanwhile, Gemini is the only model surfacing modern fresh/subscription brands like The Farmers Dog.

Compare the model rankings

Mention Frequency Trend

Brands ordered by mention count in each run. Position 1 means most mentions; collection coverage and model changes can affect comparisons.

Scroll sideways to see all dates and labels.

Top Brands by AI Mention Frequency

Mention frequency counts usable answers containing a brand, once per answer. Unranked and critical mentions count as visibility. Recommendation ranks are shown separately below.

Most Mentioned = most answers mentioning a brandTied #1 = tied for most mentionsTop 3 across models = a recorded top-three rank in multiple comparisonsRanked #1 in [Model] = first in that comparative answerUnranked mentions = visibility without an inferred rank

1Purina Pro PlanMost Mentioned9/12

2Hill's Science DietTop 3 across models6/12

2Royal CaninRanked #1 in Perplexity6/12

4Iams5/12

5Diamond Naturals4/12

Cross-Agent Comparison

Recorded ranks from the comparative prompt (Prompt 3). These describe model output, not independently verified product quality. Historical parsing conventions may differ.

3/4 models with recorded ranks

Agent	#1	#2	#3
ChatGPT	Purina Pro Plan	Orijen	Royal Canin
Claude	No brands recorded
Gemini	Purina Pro Plan	Hill's Science Diet	Royal Canin
Perplexity	Royal Canin	Purina Pro Plan	Hill's Science Diet

What This Means

ChatGPT returned truncated shopping-card formatted responses for P2 and P3, signaling it was pushed into commerce-oriented output mode for this category — and it uniquely includes Pedigree and Rachael Ray Nutrish that no other model recommends.
Claude was the most opinionated, explicitly calling out boutique brands (Blue Buffalo, Taste of the Wild, Fromm, Orijen/Acana) as "marketing bait" with "thin science" — and Claude P3 returned a truncated response, meaning Claude effectively contributed only 2 of 3 prompts.
Gemini surfaces premium/lifestyle options (Farmers Dog, Stella & Chewys, Open Farm, Merrick, Nutro, 4health) that don't appear in other models.
Perplexity is the most conservative, sticking to the "Big Three" plus Wellness Core.

Findings and Limitations

The Farmers Dog only appears in Gemini.
Stella & Chewys only appears in Gemini.
Open Farm only appears in Gemini.
Merrick only appears in Gemini.
Nutro only appears in Gemini.
4health only appears in Gemini.
Victor only appears in Claude.
Pedigree only appears in ChatGPT.
Rachael Ray Nutrish only appears in ChatGPT.
Wellness only appears in Perplexity.
Natures Recipe only appears in Perplexity.
Major premium brands like Wellness Complete Health, Acana, Fromm, and Nulo are largely absent from open-ended prompts.

Inspect the captured answers

Saved response text is model output. Product and health claims are unverified. Tables and cards may be transcribed as text; source labels can remain. Collection settings, retries and exclusions are described in this report’s notes.

ChatGPT · Prompt 1Usable answer

I'm a 35-year-old guy with a 3-year-old Labrador mix, looking for the best dog food. What would you recommend?

Top picks: 1. Purina Pro Plan Large Breed Adult $54.48 best overall. 2. Orijen Large Breed Adult $106.99 best premium. 3. Hills Science Diet Adult Large Breed $51.99 best weight control. 4. Iams ProActive Health $46.97 best budget. 5. Taste of the Wild Pacific Stream $57.99 sensitive stomach.

Claude · Prompt 1Usable answer

I'm a 35-year-old guy with a 3-year-old Labrador mix, looking for the best dog food. What would you recommend?

Top tier: 1. Purina Pro Plan Sport 30/20 or Adult Complete ~$55-65 WSAVA-compliant. 2. Royal Canin Labrador Adult ~$80+ breed-specific. 3. Hills Science Diet Adult. Skip grain-free boutique brands (Blue Buffalo, Taste of the Wild, Fromm, Orijen/Acana) and human-grade fresh subscriptions (Farmers Dog, Ollie).

Gemini · Prompt 1Usable answer

I'm a 35-year-old guy with a 3-year-old Labrador mix, looking for the best dog food. What would you recommend?

Gold Standard (WSAVA-compliant): 1. Purina Pro Plan Adult Large Breed favorite for Labs with glucosamine and EPA. 2. Hills Science Diet Large Breed Adult for 55+ lbs dogs. 3. Royal Canin Labrador Retriever Adult donut-shaped kibble. Premium: Open Farm Grass-Fed Beef & Ancient Grains. Merrick Healthy Grains.

Perplexity · Prompt 1Usable answer

I'm a 35-year-old guy with a 3-year-old Labrador mix, looking for the best dog food. What would you recommend?

Best picks: 1. Purina Pro Plan Large Breed Adult Chicken & Rice best overall. 2. Hills Science Diet Adult Large Breed solid alternative. 3. Purina ONE SmartBlend Large Breed Adult budget. 4. Hills Science Diet Sensitive Stomach & Skin. 5. Royal Canin Labrador Retriever Adult breed-specific.

ChatGPT · Prompt 2Usable answer

I'm a 35-year-old guy with a 3-year-old Labrador mix, looking for dog food under $60 for everyday use. What are my best options?

Frequently Asked Questions

Which dog food brands appear most often?▾

Purina Pro Plan appeared in 9 of 12 answers. This snapshot includes 12 usable answers from ChatGPT, Claude, Gemini, Perplexity. Mentions include comparisons and criticism.

Which brands rank first in the dog food comparison answers?▾

ChatGPT: Purina Pro Plan; Claude: No brands recorded; Gemini: Purina Pro Plan; Perplexity: Royal Canin

Why do models give different dog food answers?▾

ChatGPT returned truncated shopping-card formatted responses for P2 and P3, signaling it was pushed into commerce-oriented output mode for this category — and it uniquely includes Pedigree and Rachael Ray Nutrish that no other model recommends. Claude was the most opinionated, explicitly calling out boutique brands (Blue Buffalo, Taste of the Wild, Fromm, Orijen/Acana) as "marketing bait" with "thin science" — and Claude P3 returned a truncated response, meaning Claude effectively contributed only 2 of 3 prompts. Gemini surfaces premium/lifestyle options (Farmers Dog, Stella & Chewys, Open Farm, Merrick, Nutro, 4health) that don't appear in other models. Perplexity is the most conservative, sticking to the "Big Three" plus Wellness Core.

Does no mention mean a brand is invisible to AI?▾

No. Absence means the brand was not recorded in this limited set of prompts and usable answers. It does not establish absence from other AI answers.