Just to throw my 2 cents worth, Princess was 11 months old when we had her spayed 3 weeks ago. She was 2 1/2 lbs. She did fine through the surgery. My vet insisted on the CBC to make sure she could handle the anesthetic first. She was microchipped, spayed and had her dental work done (5 extractions). He insisted that she either go home with me to keep an eye on or he was going to take her home with him. I
my vet!!
We had a problem afterwards with the stitches sticking Princess when she would walk but she is good as new now and the little 1/2" scar is hardly visable.
I would highly recommend waiting until you can get as much done while they are out as possible. Can you talk to the breeder and just tell her that you are going to have Chloe done but want to wait until she weighs more? Maybe she will be understanding since she is so tiny. I have also heard that it is healthier to have the spaying done BEFORE they ever go into heat. I think the tinier dogs don't go into heat as soon as the bigger ones too. I had Angel spayed at 10 1/2 months old. Neither of them was even thinking about going into heat yet. i was glad to have their dental work and microchipping all done at the same time. I would never have a dog chipped while they were awake. it REALLY hurts them as i have seen it done to a lot of dogs and they scream...even super big dogs. the needle is HUGE to insert that grain of rice, which is pretty large if you think about it.
Best of luck on your decision. I will be sending prayers for a successful spaying for your baby girl. Please keep us posted on what you decide to do.
....Linda