How good is to castrate my yorkie pup?

Tomorrow my 7 m/o yorkie male is going to have a surgery. I have some doubts about this procedure. Is it worth or is it better to leave him without castrating. Please, help. I don't know either to cancel the surgery or not.

Neutering early will prevent testicular cancer & behavioral problems common in uneutered males like marking & aggression. I'd do a search online to find out the pros & cons from experts, where you'll be able to form your own decision. You'll get mostly opinion here.

Please go through with the surgeryIn the long run, the dog will be healthier as he will not have the problems with prostate and other physical issues that in tact males can have. You also won't have to worry about a neighbor coming to your door with a basket of puppies that they claim your dog fathered.Neutering a dog will help with medical issues, it may also stop the dog from marking his territory (peeing on furniture, trees, flowers, etc.), and can also calm them down a little bit (without changing their personality).

Do the surgery. Neutering is much less complicated than a spay for a female. Don't be surprised if your puppy comes home tomorrow evening acting just like he did when he left. Most neuters only take about 15 minutes to complete. You and the puppy will be much better off if you just go ahead and do it now. Surgery is so much easier on a pup than an adult dog. When the pup hits maturity he may start to mark his territory in the house and try to run off looking for girls.

Keep the appointment. If you are not going to breed him, there is no reason to keep his "equipment". There are some risks involved with not altering your pets, just as increased risk of prostate cancer and bladder problems. But the biggest one is behavior. With all that testosterone wandering around his body, not being put to use, can cause him to become aggressive to people and other dogs. Especially since terriers in general already have a very assertive behavior, and with them not being neutered/spayed, that behavior could escelate 10 fold.Now with that being said, there is no such thing as a risk free anesthetic procedure. There are a number of things your vet may have already done or suggest doing to reduce certain risks, like preanesthetic blood work to detect problems that could be affected by anesthesia, keeping him on IV fluids during the procedure, etc. But be assured, these are "routine" procedures, it's a very common surgery at any vet hospital. And a dog neuter generally only lasts about 30 minutes under anesthesia.

yes it is good to castrate because male dog like to hump females human or not.