im new here but will go to my question quickly. i have a F black lab 6 months old and was told that at this time she will be having her period. this is my first time to have a F dog so was wondering how to tell if my dog is having a period. what are the signs? right now she has not been hyperactive and would rather lay down after we play, walk or do runs. she still eats well but like i told you shes rather "tamed."