* Mercury: Tuna, especially larger varieties like albacore, can contain high levels of mercury. Feeding dogs too much tuna can lead to mercury poisoning.
* Individual Sensitivities: While rare, some dogs may have sensitivities to tuna, just like they can have sensitivities to other foods. If you notice any adverse reactions after feeding your dog tuna, discontinue feeding it and consult your vet.
* Not a complete diet: Tuna should not be the main source of nutrition for your dog. It is a good occasional treat, but not a healthy staple food.
In summary: Tuna is generally safe for dogs in moderation, but it's important to be aware of the potential risks and to consult with your vet about your dog's specific needs.