I took a look back at the website. Doesn't seem they offer it anymore.

do a google search. There are a few different test options available. Elisa and so on.

Which one of these is the one to order??

http://www.elabscience.com/index.php/product/show/tid/87

None of the above seem to have canine progesterone on this site. Now if you are breeding chickens or monkeys, you might be in luck!