I just find it hard to believe a vet would practice this type of breeding. With the problem of pet overpopulation, what makes you think that you are not contributing to the problem?
And, I don't care how you package it, wrap it up with nice words and describe it - you're still operating a puppymill, by my definition.
You advertise teacup chihuahuas (marketing ploy), sell with breeding rights, and have that many breeds - all the red flags are there.
I would like to be polite and just "welcome you to YT", but I'm too disturbed by what I've seen and read on your website. And, am wondering if your agenda here is to primarily promote your puppy sales?