It's blood pooled up in his scrotum from the surgery. Basically extreme bruising, this could also be initiated more so from too much exercise after surgery, which your vet should have told you no exercise for at least 5 days after surgery. If it's looking really bad and you're concerned, call your vet. My dog was just neutered and the entire bottom of his scrotum is jet black.
Yes it is possible. It would be swollen and be have some bruising.
They're removed and destroyed as biological waste
A male dog has been Neutered.
You need to take your dog in to be checked out by a Veterinarian and then neutered. The testicles will 95% chance turn cancerous after a period of time. You must get him neutered to insure your dog's good health.
Neutering does not affect a dog's growth. Dogs typically stop growing around 1-2 years of age, regardless of whether they are neutered or not.
They can as they still have instinct even if they have been neutered.
Not all the dogs and cats that are adopted from a shelter are always neutered.
is it normal for dogs to have 4 testicles when they start to play
Neutered dogs may sometimes attack unneutered dogs due to territorial behavior or aggression, which can be influenced by hormones and social dynamics.
I don't know if there are any dog show that allow spayed and neutered dogs.
no
To prevent them from siring more puppies.