Or indeed cats.
I am thankful none of my cats seem to desire chocolate.
When I was a little girl, I obtained a very obese cat. I loved this cat, probably more than anything else in the world. I did not understand what a cat should and shouldn't eat, and being as she was my cat, the only cat I was used to, didn't properly grasp that my feline was the size of a Mack truck.
She didn't like the shells on the M&Ms, so I'd unshell them for her.
The cat probably ate a lot of things cats shouldn't eat. She was well over 20 lbs. We were never certain of her exact age, but roughly estimating between how long we had her, and when her former owner died, she had to have been, at the youngest, 20.
(I'm not advocating feeding your pets chocolate. Just sharing a memory.)