Yes. It is just like how after the first sex, a human can get pregnant.
Often, a male dog is protective of the pregnant female dog, usually if he is the "mate." Sometimes dogs, mates of the pregnant dog or not, will act aggressivley towards the female dog, also known as the "bitch."
He will try to mate with her, stand up on her back & hump her. If she is not fixed she will get pregnant.
I have a male that does it to everything. Not something we particularly like to see, but it is normal.
By mating with a male dog.
There are a number of possible reasons as to why a male dog may not hump anything. The usual reason is because the dog has been neutered and no longer has the desire.
Yes.
No
Yes. Only the testicles on the male have been removed, not the penis. Penetration will still happen, as the male dog can still maintain an erection. There is just no sperm production. Indeed, neutered male dogs can maintain an erection, penetrate a female and actually achieve orgasm, and will "tie" with the female. Most neutered males are less interested in sex due to lowered testosterone levels, but still capable of all the actions. They simply do not produce sperm and cannot impregnate a female.
If the female is trying to get pregnant with a male dog then it will go on the males back but if the female dog is going on the males back while pregnant then it may means that they wanted to have another baby.
Like breed her? Female will usually only allow a male on her when she is in heat.
no but its highly likely
If the male has not been neutered and/or the female has not been spayed, then yes. And unneutered dog can get any unspayed female dog pregnant.