No...animals go into heat. Does do bleed a little, but most animals do not....it is only during this time that they will allow sexual advances from males...and it only during this time that they will conceive. Humans have periods and are the only "animals" that do so.
Dogs go into heat, which is basically a period but for dogs. I don't know of any other animal that goes into heat though.
only higher primates have menstrual cycles. Other mammals, such as dogs have whats known as an oestrus cycle.
If they aren't spayed then yes they usually do.
Yep, Dogs do... and a lot of other things.
That's "dogs" ....not "does" ;)
dogs do =)