Now I don't totally agree with the link Kela posted because in saying that male dogs should not be neutered unless Vet advised is naive. While I agree it should be on a dog by dog bases with taking the overpopulation out of the equation its been reported that 85-90% of hit by car are unaltered male dogs. They will seek out a female in heat if they smell one near by, there is increased aggression and territorial behaviors, marking and same sex fighting.
Sure there are risks but I have witnessed more then 500 spay and neutered being involed with low cost clinics and having only ever owned altered animals I have not had one with any one of those illness they listed.
Its one thing if an owner is well educated and will take the necessary precautions to own an unaltered animal but lets face it the majority of pet owners can not or will not.
This statement here threw up a hug red flag for me.
In a breed health survey study of Airedales, spay/neuter dogs were significantly more likely to suffer hip
dysplasia as well as “any musculoskeletal disorder”, compared to intact dogs52, however possible
confounding factors were not controlled for, such as the possibility that some dogs might have been
spayed/neutered because they had hip dysplasia or other musculoskeletal disorders.
Compared to intact dogs, another study found that dogs neutered six months prior to a diagnosis of hip
dysplasia were 1.5 times as likely to develop clinical hip dysplasia.53
Compared to intact dogs, spayed/neutered dogs were found to have a 3.1 fold higher risk of patellar
Hip dysplasia is hereditary and rarely seen in mixed breed. Luxating patellas can be seen in purebred and mixed dogs but it asinine to suggest that the spaying and neutering increased it. So enter in the fact that they do not say weather these purebreds came from breeders who did heath checks or they were from puppymills or what have you.
Anyway from where I sit spaying and neutering benefits far
out weight the risks. But I'm not a vet and I just have personally experiences to go by.