Unspayed female dogs can have their first heat cycle anywhere between 6 and 15 months of age. During heat, which happens every six months or so and lasts a few weeks, your dog can get pregnant.

It can also be useful when trying to figure out the best time to have your dog spayed. Female dogs go into heat when they first reach puberty, also known as an estrous cycle. Smaller breeds tend ...

Dr. Samantha Gerbers says the likelihood of female dogs developing Mammary Cancer increases to 24% if they are not spayed by ...