> I really don't understand why people assume that a bitch can't be fertile on day 15. I've had bitches receptive much later than that, and successfully conceive. There isn't a standard day for a bitch to be ready.
Quite true and I never even try to mate mine now before day 14 as experience with my girls has shown me that they tend not to be ready until at least then and some much later.
If you have only just got a mating now, I would not think she would have gone over by Thursday, and that would be the best time to try again.
Often if the bitch isn't truly ready, then a dog will mount but not be truly serious. a young dog like this will be mounting because the bitch is allowing it, but her scent may not be driving him to maximum effort until she is spot on.
I often find, especially proven bitches, that they will flag and stand about two days before a really experienced stud will bother with them beyond a bit of flirting.
A lot of inexperienced boys need a bit of excitement, and that is more likely in the garden with minimal interference, but as someone sais earlier, if it hasn't happened in half an hour then separate and try again later.
When I have had males to stay with girls to be mated I usually get a mating in the morning after everyone has been out for the first wee of the day and then I let the pair out for a bit of flirting, with me watching unobtrusively.
Also always approach slowly and quietly once the boy has stopped ladder climbing, and is preparing to turn, so that no-one is panicked, or you don't disturb him at wrong moment.