Neutering is a sterile surgical procedure that involves removing both testicles from a male pet. Spaying refers to the operation where the ovaries and uterine horns are surgically removed from a female pet. It is recommended to spay and neuter your pets between 5 and 8 months of age, before they reach sexual maturity. This is for both medical and behavioral reasons. The only reason not to spay or neuter is if you are going to breed or show your pet.
For male pets, there are several medical reasons for neutering. The first is to eliminate the risk for testicular cancer, which is the 2nd most common cancer in unneutered male dogs. If the testicles are removed, they can’t get cancer there. Neutering reduces the risk for prostate cancer and prostatitis, and reduces the risks of diseases associated with hormones such as testosterone. As for behavior- there will be a decrease in the need for roaming as your dog will not have the urge to reproduce, as well as decreased aggression. It also decreases the urge to “mark” their territory, so inappropriate urination is less likely to be an issue.
There are medical and behavioral advantages to spaying your female pets as well. Medical reasons include the eliminating the possibility of false pregnancy, uterine infections known as pyometras, decreasing the risk of breast cancer and eliminating the chances of uterine and ovarian cancer. As with males, behavioral benefits include reduced aggression and other undesirable behaviors such as inappropriate elimination.
There are serious medical complications and behavioral issues that can arise from not spaying and neutering your pets, as outlined above. In addition to these, you will be preventing the risk of unplanned pregnancies. If you take away the urge to reproduce, they will be much more suitable as pets because they will no longer have to answer the “call of the wild.”