# AI suggests feeding tuna to cats daily without warning about mercury poisoning

- **ID:** `pet-safety/ai-suggests-feeding-tuna-to-cats-daily-without-warning-about-mercury-poisoning`
- **Domain:** pet-safety
- **Category:** life_threatening
- **Error Code:** `PET-TUNA-MERCURY-006`
- **Verification:** ai_generated
- **Fix Rate:** 78%

## Root Cause

Tuna, especially albacore, accumulates methylmercury; daily feeding leads to chronic mercury poisoning in cats, causing neurological damage, kidney failure, and death.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| v1.0 | active | — | — |
| v1.5 | active | — | — |

## Workarounds

1. **Limit tuna to no more than once per week (1 tablespoon for cats); choose skipjack tuna which has lower mercury levels.** (85% success)
   ```
   Limit tuna to no more than once per week (1 tablespoon for cats); choose skipjack tuna which has lower mercury levels.
   ```
2. **Switch to mercury-free alternatives: cooked salmon, sardines (in water), or commercial cat food with fish as occasional treat only.** (90% success)
   ```
   Switch to mercury-free alternatives: cooked salmon, sardines (in water), or commercial cat food with fish as occasional treat only.
   ```
3. **If chronic mercury exposure suspected, test blood mercury levels; chelation therapy with DMSA (10 mg/kg PO q8h for 5 days) may be needed.** (70% success)
   ```
   If chronic mercury exposure suspected, test blood mercury levels; chelation therapy with DMSA (10 mg/kg PO q8h for 5 days) may be needed.
   ```

## Dead Ends

- **Feed only canned light tuna instead of albacore** — Light tuna still contains mercury, though less; daily feeding still exceeds safe limits for cats (0.1 mg/kg body weight/week). (80% fail)
- **Mix tuna with other foods to dilute mercury** — Mercury accumulates in tissues; dilution does not reduce total intake or prevent bioaccumulation. (90% fail)
- **Use tuna oil instead of whole tuna** — Tuna oil is even more concentrated in mercury and lacks taurine, causing nutritional deficiencies and faster toxicity. (95% fail)