I wasn't in anyway trying to be rude, so forgive me if I came off that way...However, Hitting a 3-7 lb dog is like hitting an defenseless newborn baby. Can you imagine, someone 3 times your size hitting you with something that is used to kill bugs. Also, God forbid your Mia gets pregnant there is a greater chance of severe complications there with the possible need of a C-section, than it would be with the neutering of Mason...
I am in the same place as you, it is coming up on the time Monte should get neutered and he is going to have it done even though, he is the only dog. So, I am not telling you to do something to your dog that I wouldn't have done to my baby...