Have used pg600 on our small breed bitches. Work great. But then again I've always got good products from revival.
I used PG600 with one of my girls that only cycles every 10-11 months. I followed Revival's recommended protocol - sunshine, doubling up on vitamins for the few weeks preceding the injections. I gave her the injection as directed on the appropriate day - apparently the injection is VERY painful, as she cried out and it took 2 people to hold her to complete the injection. She responded after only 1 injection and was in heat within 1 week. She ovulated 9 days after her first day in heat (which is a little fast for her by about 3-4 days) I bred her 2 days after ovulation. Everything seemed to happen slightly ahead of what was "normal" for her. I did her progesterone testing, and planned to breed her naturally. Well, the stud was super interested, but she would have NOTHING to do with him, was not flagging at all either - but the numbers were perfect. We tried again the next day, and ended up doing a side-by-side AI. Kept my fingers crossed that everything worked - but ultrasound showed no puppies - VERY disappointed to say the least.
P.G. 600 works miracles
My French Bulldog never had a heat, tested her thyroid nothing. I waiting until 3 years old and gave her the shots exactly the way they said to do it. It took 4 shots before her real heat begin all the others would start and then stop after a few days. I did hormone test but was told that the hormones test could be off do to the P.G. 600. I waiting to the point she was flagging and took her in to do the test and did the AI. My girl had 5 beautiful pups and so rare the first in the world to be dna as its color. I'm very happy with this product and they it works wonderful. I would not use it unless I really feel its needed only because I totally believe in letting nature do what its suppose to do but in my girls case it was never going to happen without help.
We breed small dogs and have used this successfully to bring a bitch into heat when she is overdue. Simple and easy!
Used on my Labrador and only had to use one shot. She was in heat 4 days later after 11 months with no heat cycle.