
I used it with my girl some years back, it was hard work to get a decent amount of saliva, but I did mate when I saw the ferning, as well as blood testing, and we did get puppies. I also used it on whatever day AFTER the mating it said, apparently if you get ferning then (can't remember when) it's a good indicator of pregnancy. Have lost the Mate Test device in the intervening years though and I have a vague idea they don't make them anymore. :-(