So I’m a total pet-drug-pusher. I had a cat who seriously jonesed for breve (half-and-half) so I gave her a milliliter a day. My dog today needs peanut-butter like it’s the ambrosia of the gods. It’s a small treat every once in a while.
Out of respect for your friends of fur, allowing them a small dose might enhance their enjoyment of life a bit, especially since we are social beings who enjoy sharing a meal with each other. And unlike half-and-half, cats can actually digest tuna.