Hi, just thought I'd stick my
. There really is no reason for an animal to stay overnight after routine spay/neuter unless the clinic wants more $$$, or there is a complication, which rarely happens. The only time we keep a cat overnight is when they are declawed, some cats don't like the feeling of it and will shake their paws, and if they hit it hard enough, they may bleed, causing the owners to freak. We have only had that happen 2x in my 14 years working there. By the time the cat is ready to go home, they are more adjusted to the feeling and are practically running around the house when they get home.
We usually recommend spaying female dogs at about 6 months, it is best to spay before they go into their first heat, as this reduces the chance of breast tumors by almost 95%, and breast tumors are almost always malignant. Another good reason to spay female dogs is you don't want them to have an emergency situation, like Pyometra. This is a condition where the uterus becomes infected, full of pus, and if left untreated, it may rupture and death is quick to follow.
A healthy uterus on a large sized dog is the usually the diameter of a drinking straw, maybe a little larger. When a dog has Pyometra, that uterus is now the diameter of a baseball, there is also a higher risk during surgery, as the incision has to be larger, the dog's health is compromised from the infection, and it usually present in older dogs, over 8 yrs old. There is always a risk during surgery, but when done on young, healthy animals, the risk is minimal, and recovery time is quick.
Males should also be neutered at about 6 months, some dogs are cryptorchid or monorchid (meaning one or both testicles is not yet "dropped" into place). The risk of prostate problems and testicular cancer go up as they age...
Anyway, I think I've babbled enough about this, thanks.
I have found that in my experience, the female will always dominate the male, and 2 male dogs are more to fight when a female is present, in season. My Snarf was the dominant female, and when my grandparents passed, we took their dobex female, who used to try to dominate Snarf, all the while our male was getting his kicks watching.....so, I would also agree on the 2 female thing.....Catfight!!!
OH, and one more thing---I see it in my clinic all the time, the men have a hard time neutering their male dogs, the wife wants it done, and he is having "sympathy pains" for his male friend. Male dogs surgery is very quick, the longest part is the anesthetic,the actuall surgery is about 8-10 minutes, the females are more complicated. It's always harder on the female, humans or cats/dogs/add your species here________!