The dog neuter surgery, and spaying and neutering of dogs or cats in general DOES NOT "make a pet fat and lazy". In a healthy dog or cat, free of hypothyroidism or other medical disorders, overfeeding and insufficient exercise are the sole causes of a
pet being overweight. Don't blame the dog or cat spay or neuter surgery if a pet becomes overweight. If you are having trouble with your pet being overweight, read how to keep a pet at optimum body weight.
The dog neuter surgical procedure is performed under general anesthesia and employs sterile instruments and a sterile surgical field. Medical emergencies can arise if a pet becomes infected during these procedures. No surgeon approaches a spay or neuter as if it were "routine" because each surgery is different from every other because each pet is different, and although neutering might be deemed a minor surgery a spay certainly qualifies as a major procedure. (So if you wonder why the charges for these procedures seem high, you just may reconsider after visiting The Surgery Room.)