Thank you all for your posts! Considering your responses, and my constant battering
she is going to schedule with my vet for a second opinion/spay. We suggested neutering the 3 boys but they are her brothers and apparently a neuter to him makes them less manlyish.
My vet's practice is a father and son and both are very experienced with small dogs, they did spays on both of my Malteses. Thank you all, I love love love YorkieTalk.