It depends on the weight of the dog and the Veterinarian. Call around to different Vet offices and have the weight of your dog handy and see who is the cheapest. I would also inquire of your Local Animal Shelter when they will have spay or neuter certificates out to help you with the cost of neutering your dog.
castrate him
In the same way a dog or cat would be. They are anaesthetised and then the testicles are surgically removed.
The cost to castrate a ferret is can widely vary depending on where you live and even between veterinarians in the same city. Contact veterinarians where you live about costs.
A castrated female dog is called a spayed bitch
No, unless it gets aggressive against you for a longer period. Then, i recommend an implant. You should ask your veterinarian for more information.
You don't have to castrate them because they are genetically infertile, or cannot produce offspring.
You cut off it's testicles, the same way you castrate any mammal.
To castrate.
Yes
You can't "castrate" a female of any species. Castration is the removal of the testicles, which females dont have.
Yes. To castrate is to neuter, but there may be other ways to neuter other than castration.
You can castrate any male on Howrse up till the age of 8 years old.