Hello guys can you tell me if my dog is in heat. I have just done some readings over the internet. So far I haven't seen any blood on the floor. My male teacup chihuahua did try to hump her though lol. I also read that their teats swells? Well my dog teats are swollen right now. Should I stop taking her to the park for at least a month? I haven't check the swollen vulva part yet, but I will tomorrow.