
Hi Alice, I bought one last year. On the plus side every bitch we used it on has had a litter, but I am not sure if I wouldnt just have mated them at the same time whilst watching for the usual signals. The 'fit n fetile' guy, was very scathing about them, and said you could only really assess the success is by doing only 1 mating just when the machine says - there is a flw in the logic there somewhere, I think:). The first bitch I used it on had fertility problems - one litter, then nothing for almost 4 years, she had erratic seasons, and would happily stand from about day 2 to day 20! The tester said mate from day 7, we did, and got 5 pups (also mated day 9, 11 & 13:).
I think i t is a useful back up, look forward to hearing how you do with it.
On a similar topic I got a mail from a pug friend in America saying she had been doing a study of urine test strips to predict fertility, and whils neither she nor her vet had any idea why ph should change due to ovulation, it appears to, and the chang in colour of the strips conicided exactly with premate blood tests. She has promised to update on here further findings.
Gwen