Haha bit weird... but I've always wondered if they did?
Anyone have any ideas?:D

Female dogs do when they are in season.
Don't know about any other animal

Yes they do. Different animals will have different cycle lengths though.

Lol, I personally don't know why this is under the teens section.

But all Mammalian species do get periods.

My hamster got the period lol and a month later he died >< but yea they do. Even rabbits , dogs and cats I guess