In my experence, (9 dogs, 8 altered) it takes anywhere from 3 days to 1.5 weeks
The answer is that it should be calmer after neutering. It will not have testosterone coursing through its system. So, it should be less aggressive, less territorial, and more content.
Yes, a neutered male dog will not have as strong a scent and there won't be as much testosterone in the marking urine.
They can as they still have instinct even if they have been neutered.
They do not get sexual urges and are, in general, more calm. Dogs that are spayed or neutered have a tendency to be less aggressive. However, spaying or neutering your dog too late in life may not have these effects on him/her.
Not all the dogs and cats that are adopted from a shelter are always neutered.
I don't know if there are any dog show that allow spayed and neutered dogs.
First of all no girls are neutered. Boys are neutered. Only in dogs and cats. Not people. If you have a female pet, it has been spayed, then no, its heat cycle will stop.
Yes it is possible. It would be swollen and be have some bruising.
no
if you mean a dog being spayed or neutered, No they do not get mean, only people make dogs and cats mean!!
To prevent them from siring more puppies.
Yes, greyhound rescue organizations neuter their dogs before adopting them out. Sometimes the dogs arrive at the rescue intact but they are neutered before leaving.
Yes. Neutered males remain fertile for up to two weeks following the procedure.