If you are talking specifically about size, veterinarian can neuter very small animals because this type of surgery doesn't require going into the abdominal cavity. If you are asking about age, veterinarians can neuter as young as 3 months of age depending on other risk factors such as size and overall health.
Take an empty small coffee can and put some pennies in it enough to make a loud noise, when this happens shake the can.
A dog can be neutered at any age after 6 months.
The risk of a dog developing certain types of cancer is reduced if the dog is neutered.
The sterile dog can not cause/have puppies, either because it has been spayed/neutered, or because of genetic issues.
no
a neutered dog
Yes. A neuter dog's penis is still intact, and that is what causes the tying, although neutered dogs generally don't have the drive to do so.
He will eventually, my dog is six and he was neutered. Give it a couple of weeks.
yes
Yes, a neutered male dog will not have as strong a scent and there won't be as much testosterone in the marking urine.
Put a neck collar on the dog.
Is the dog neutered? That would help. It could be showing dominance.