No, our old cat and dog could never play with my animals
The cat ignored them, but he was fully aware they were there, and if they ever got out while he was there I'm sure he would have tried and kill and eat them
Our new dog has sniffed them, but she's a bit unsure about them and barks at them.
They really do not care, but I'm not sure what she would do with them, if she got the chance.
I do know of some people who let their dog or cats play with their animals, and there's no problem with it at all.
I think it depends on the animals. If you have a cat that's used to hunting outside, it's not the best thing in the world. The same goes for a dog that's used for hunting, or shows a lot of instinct in that direction.
I saw this super cute picture once.
A cat was laying beside a woman who had some chinchillas out.
A baby chin got onto the cats tummy, found a nipple and started sucking.
Mind you this was a male cat, but he just started purring >_<
The picture was so cute, and this cat never hurt the chinchillas. He just let them do what ever they wanted