But there are too many puppies for available good homes, and not spaying your female dog may put her health at risk. Avoids unwanted pregnancies. OK, it takes two to tango. Besides further preventing unwanted puppies, neutered dogs make better family pets. Aggression will be reduced and so will the tendency to roam and fight.
Neutering can also reduce the incidence of prostate and testicular cancer.
Kittens are definitely darling. But there are far more kittens than there are good homes for them. Unspayed female cats older than about 5 months can give birth to several litters every spring and summer. Each litter can be as large as seven and be fathered by more than one male cat. It's not uncommon for unspayed female cats to nurse two litters of different ages at the same time.