I am reading your thread and it is exactly me with Lexie. Although she is 3 lbs. but I am still worried since she is tiny. I have thought about finding a vet that just does the gas mask and pull out only her baby teeth. I am also going to research, the pros and cons of spaying.
My Lexie will be 1 next month, went through her 1st heat at 10.50 months.
Good luck.
