A bitch is on heat for around 61-63 days depending on your dog (not breed but individual dog) if you want to breed her its best in the second week of this period.
Female dogs go through a heat cycle, called estrus, every six months. She will have proestrus, or a bleeding cycle, before her true heat cycle during which she is very receptive to the advances of...
A female dog is typically in season for about 21 days and consists of three phases. The first phase, proestrus, is when the bloody discharge occurs. Proestrus typically lasts 7-10 days and is noted...