
Hi Tammy
I can give you info on my own experience, if that helps.
First, from a health point of view. I like entire males, and spayed bitches. I consider it to be far more beneficial to neuter a female rather than a male.
I bought a tiny Chi bitch that was advertised for breeding :-( I was livid that someone without knowledge would actually try to breed from her. I bought her so that I could have her spayed.
I let her have one season, and discussed spaying with almost every vet that I know! Which is loads. As an adult, she weighs 3lbs. All vets said that they would do it. But, one honest vet told me that I would be best to use a vet that wouldn't be nervous of something so tiny! And the vet that went in with total confidence was the one to choose.
My vet has spayed bitches even tinier, and regularly spays ferrets. He assured me that he wasn't worried about anaesthetic as they are so safe today. She had a very successful operation, with the tiniest of incisions, and I actually had to crate her several times a day to cut down on her boisterous bouncing!
I would 100% advise that you get your tiny girl done while she is fit and healthy, so making it an easy ride for her. I had my girl done half way between seasons, to make it easier for my vet. I don't have any regrets at all, it was the best decision for her. And she keeps my stud boys happy by sleeping with them when the other girls are out of bounds!
I say go for it! :-)