dogs heat cycles

Question
Is there a shot that can bring a dog into heat.  In know we have things like that for cattle, so I was just curious.  Thanks!

Answer
Hi Bill:

There are a few methods used but almost all are under some degree of scrutiny for various reasons. I hope you'll forgive me but instead of tediously typing out what little I know about the subject I'm including a link which discusses the techniques as well as the pros & cons.

http://lowchensaustralia.com/breeding/induction.htm