I use StarKist tuna in spring water. When using and needing to drain, why not drain the nutritious water off and top-dress dry food with it? I also provide some of the tuna and a crumbled up hard-boiled egg two or three times a week for additional variety and nutrition.

Pros: healthy, tasty, palatable, easily digestible

Cons: none known

I've been pouring tuna juice on food for cats for years. They smell it as soon as the can is pierced & they naturally want some. It can't hurt them & it's a waste to pour it down the drain. So I stir it in a little of their kibbles & they enjoy it a lot!

Pros: cats like it

Cons: none

There is nothing like tuna juice! Yummy! I usually dilute the tuna juice with water to try to increase the amount of fluid consumed. But the high Mercury levels are definitely a problem.

Pros: A good way to increase fluid intake for cats

Cons: I have concerns about the high levels of mercury in tuna

This is a good treat. I drizzle some over dry food and it gets those finicky eaters chowing down. It is also nice to give as a treat. They love it.

Pros: good treat, good for finicky eaters

Cons: none

I pour tuna juice on the cats dry food and let it sit a few minutes. They Start purrring as soon as they smel it. They LOVE IT!

Pros: Cats and Dogs LOVE IT

Cons: Smelly