Why do dogs stay overnight at the vet when they are spayed?

Many vets like to check the dog after having the stitches in for a while. Some dogs try to chew their stitches, so they can fix it right away. They can check to see if the dog has any reaction to the anesthetic, or any other problems the dog might have. Many vets do not require this, but it is usually a good idea. Also, if your dog is in a cage for 24 hours, it is not going to mess with the housebreaking--the istants do take the dogs out once the dog is conscious again. The cage will probably not mess up the housebreaking process because it will not ociate the accident with home because the location is different.