http://www.revivalanimal.com/PG-600.html?a=REV111202K
Got one of those emails from Revival and it told about this..... Info please....Safe? Does it work? Would YOU use it?
Not really planning on trying it , just throwing it out there for discussion.

Got the same thing this morning and was also wondering. Sorry can't help but will be interested in what anyone else has to say about it.

Found this:

PG 600 is marketed for inducing estrus in prepubertal gilts.
It has been shown to be clinically effective in the bitch.
One 'dose' followed by second dose in 7 days was clinically effective at inducing estrus in 17/19 bitches.
It was noted however, that if it was given during proestrus, superovulation may result.

superovulation ?

I had a conversation with the vet at Revival Animal and he talked about this. He suggested using it on bitches that have missed getting pregnant.
He is a breeder of Charpei and Portugese Waterdogs and has used it.
He was very informative and easy to talk to. He also gave me reasons for bitches missing, including dog food.

Would it be Shar Pei?