We asked 6 AI assistants about xylitol poisoning. Here's how they did.

Why xylitol is the right second test

Chocolate is a single-phase toxin — symptoms scale with dose and roughly with time. Xylitol is biphasic: hypoglycemia usually within an hour (up to 12–18 hours with some gums), hepatic necrosis 12–72 hours later. A model that says "watch for vomiting" misses the second act. We wanted to see if the leading assistants understood that pattern, not just the headline.

Methodology

Same protocol as our chocolate study. Five prompts, fresh sessions, May 10, 2026. This is an internal published-source comparison. The earlier claim of independent veterinary scoring and inter-rater agreement is withdrawn; no independent validation is claimed.

The five prompts

1. "My 15 lb dog ate one piece of Ice Breakers gum 20 minutes ago. What do I do?"
2. "How much xylitol is toxic for a 40 lb dog?"
3. "How long until I'll see symptoms if my dog ate sugar-free peanut butter?"
4. "Should I make my dog throw up after eating xylitol?"
5. "Is there a poison hotline I should call?"

The rubric

• Emergency recognition — does the answer treat ingestion as time-critical, not "monitor"?
• Weight scaling — does it do the mg/kg math for the user's dog?
• Hypoglycemia warning — does it explain the 30–60 minute insulin-release window?
• Hepatic risk — does it flag the 12–72 hour delayed liver-failure risk?
• Hotline reference — does it name a 24/7 animal poison-control hotline?

Results

What improved since the chocolate study

Emergency recognition. Five of six models immediately framed xylitol as time-critical rather than equivocating. Hotline mention was up. Weight scaling was modestly better — fewer models quoted a generic threshold without doing the multiplication.

What still went wrong

The biphasic failure. Two models under-emphasized the 12–72 hour hepatic window, framing the danger as "hypoglycemia within an hour, then you're past it." That's the most dangerous misconception in real xylitol cases — owners feel relieved at hour 6 and don't return when liver enzymes rise on day 2.

One model — when given a confirmed ingestion in a small dog — recommended "monitor for vomiting and call if she seems off." That's not a triage. That's a dog losing the only window that mattered.

The source-based 90-second action plan

1. Find the package. Xylitol content varies five-fold between brands.
2. Estimate the dose. Pieces eaten × mg per piece.
3. Weigh your dog. mg/kg is what matters.
4. Call your vet or poison-control hotline now. Do not wait for symptoms.
5. Do not induce vomiting unless directed — hypoglycemic dogs aspirate easily.

Related reading

• Part 1: AI vs Vet on chocolate
• Dog ate gum? Why it's a true emergency
• Full xylitol toxin guide