> Id test around day 8 if you can & IDEXX will give you a hormone level and advise how many days to wait to mate. Or if like our experience, mate immediately! Good luck
They do advise if you don't have anything to go on to start testing day 8, to hopefully, as in you case catch an early ovulatory.
For most bitches this will mean several blood draws (average three) before getting a result showing ovulation has occurred. The one bitch who had three draws absolutely hated it, drawing blood is pretty invasive.
Testing once and going by the figures you get and extrapolating what the average bitch does re hormone levels can lead you wildly astray, as some bitches stay at a pre-ovulatory level for ages some rise quickly, so the only reliable method is to test until ovulation has occurred.
You were very lucky to be charged so little fro the blood draw, the most recent time I had one tested while bitch was at stud, as we had reached day 17 with no interest from the stud it cost £57 for the one single idexx and blood draw and that was in 2008. Turned out she was only approaching ovulation and was mated day 18 - 22.