Can British Shorthairs Eat Tuna? — In Moderation [Vet Guide 2026]

Answer

⚠️ Moderate

Safe Serving

1-2 tablespoons max

Risk Level

Moderate

⚠️ Avoid

Too much causes mercury poisoning

⚠️ Caution — Very Small Amounts Only

Tuna popular with cats but limit due to mercury for British Shorthairs.

Is Tuna Safe for British Shorthairs?

Tuna is not directly toxic to British Shorthairs but must only be offered occasionally and in very small amounts. Tuna popular with cats but limit due to mercury for British Shorthairs. Feeding too much or too frequently causes digestive problems and potential long-term health issues.

Mercury builds up — limit to occasional treat only. When introducing Tuna for the first time, start with a smaller amount than recommended and wait 24 hours to check for any adverse reaction before offering more.

⚠️ Always avoid: Too much causes mercury poisoning — these parts should never be given to your British Shorthair.

Risk: ModerateModerate — use caution

How to serve Tuna to your British Shorthair

Remove Too much causes mercury poisoning completely before preparing.
Start with half of 1-2 tablespoons max — wait 24 hours before offering more.
Serve plain only — no seasoning, salt, sugar, or additives.
Keep treats under 10% of your British Shorthair's daily calorie intake.

Nutrition — Tuna

Safety	⚠️ Use caution
Frequency	1–2× per week
Amount	Very small only
Monitor	Watch 24 hours

Vet tips for British Shorthair owners

💡"In moderation" means once or twice a week maximum — never daily.
💡Monitor your British Shorthair for 2–4 hours after first giving Tuna for vomiting or unusual behaviour.
💡If your British Shorthair has any pre-existing health conditions, ask your vet before offering Tuna.
💡When in doubt, leave it out — there are plenty of fully safe treat alternatives.