Scientists have discovered how sterilization affects the health of dogs
The results of many years of research conducted by American scientists, veterinarians, showed that the risks to the health of the dog during sterilization are highly dependent on the breed. The paper was published in the journal Frontiers in Veterinary Science.
Scientists from the University of California, Davis analyzed data on several thousand dogs of 35 breeds 15 years of observation in a Veterinary medical teaching hospital to understand whether the consequences of sterilization, the age and gender of the dog.
As the possible consequences of sterilization considered joint diseases, including hip dysplasia and elbow joints, ruptures of cruciate ligaments of the skull, and also cancers — lymphoma, hemangiosarcoma, or cancer of the blood vessel walls, tumors fat cells and osteosarcoma, or bone cancer.
The researchers found that between species there are huge differences. Some breeds of dogs the risk of cancer and joint diseases during sterilization or the removal of the ovaries is very high, others low. The risk of problems regardless of the age of sterilization.
"Between the rocks there's a huge difference — presented in a press release of the University the words of the lead author of the study Benjamin HART (Benjamin Hart), Professor of the school of veterinary medicine University of California, Davis. — There is no one size fits all, when it comes to the health risks and the age at which a dog is neutered. Some breeds develop problems, others not, some had developed joint disease, but not cancer, or Vice versa."
The researchers found that the vulnerability to the diseases of the joints associated with the body size of the dog.
"Smaller breeds don't have this problem, while most larger breeds, as a rule, there are diseases of the joints," says another study author Professor Lynette HART (Lynette Hart).
An interesting exception were the representatives of the two giant breeds — Danes and Irish wolfhounds. They had no diseases of the joints during sterilization at any age.
The researchers also found that the incidence of cancer in young dogs was low, regardless of castration was carried out or not. But here was the exception to small Boston Terriers and Shih Tzu, there was a significant increase in the number of cancer cases during sterilization.
Another important conclusion was that the gender of the dog also sometimes matters.
For example, females Boston Terrier, neutered in a standard six month age, there was an increased risk of joint diseases or cancer compared to intact dogs, but males of the same breed risks were elevated.
Previous studies have shown that, during sterilization or spaying females are generally more at risk of developing one or more types of cancer by 5-15 percent compared to males.
The authors hope that the results of their research will help dog owners more informed decisions about castration.
"We think that the decision of the owner of a pet must be thoroughly considered and be taken after consultation with a veterinarian, and not under the influence of public opinion," notes Benjamin HART.
The study provides recommendations for pet owners and veterinarians for each of the 35 breeds of dogs.