At what age does a puppy become a dog?

I breed dogs and know from experience that small breed male dogs can become sexually mature at 5 months. Females come into heat at between 6-9 months of age. This doesn't mean the dog is full grown, only that he's able to reproduce. Generally a puppy is full grown at 12 months.

at the age of 2 and half year you can find stickly solution kind of thing comes out and females drops of blood will oooze that the indication

The first answer is wrong. A puppy becomes a dog when its one years old. I study dogs

They are both wrong, a small breed dog is an adult when he is around 5 months, a medium breed is an adult when he is around 9-10 months and large breed is an adult when he is 18 months.

actually, my vet told me that a small breed would be 'adult', as in- has adult teeth, is able to breed safely, and is no longer growing- at about 18 months, and large breeds, not until they are about 3 years old. i have a st. bernard mix and they told me she would be growing until 3 years old.

The question itself is not stated correctly. In humans, society has long debated when a child becomes an adult--this argument, however, can be in regards to sexual, emotional, or intellectual maturity. In the case of dogs, it is best to think of this question in regards to sexual maturity (the ability to reproduce). So, the question should read, "at what age does a dog become sexually mature, and hence able to reproduce?" The exact date is different for all dogs, but can range on average anywhere from 5 months to 24 months. Smaller breed dogs tend to become sexually mature earlier (around 5-6 months), whereas some large breed dogs may take up to 24 months.

First answer by ID3508697119. Last edit by Cutelilvixxen. Contributor trust: 0 [recommend contributor]. Question popularity: 70 [recommend question]