How Long Is Apbt Heat Cycle

Alot of people have told me difffernet things about the heat cycle and to tell the truth I don' t know who is correct.I just wanted to ask the people in the pitbull community on some general info about female APBT and their heat cycle.Also I wanted to know how long are they in heat. And what is the best time to breed a female. So if anyone knows any general info it would be very helpfull.

 

i know my female would not anything touch her i the beginning of her cycle she would fight anything off of her but It was about 4-5 days that she would let another dog hit. she would throw it . It was like she was loosin her mind. That when you need to lock her up. I don't know if all dogs are different but that how my peaches was......

 

I think its 21 days. 7 days coming into heat 7 days in heat and 7 days going out of heat. I know my GSD is about 21 days. Now as far as breeding I thought it was in between the 9th and the 14th day they will accept a male. But Im not sure so don't hold me to it! lol