On my bitchs last season, she was premate tested and was ready on day 18 but she missed anyway.
she is back in season now and i was wondering if they are the same or around the same time every season that they have?
or could she be totally different and be ready on day 12 etc?

some are the same and regular about these things and some vary greatly.

Hi, I know of bitches that are ready on day 10 and others on day 21!!! I had the pre-mate test for my bitch and it was totally wrong! Are you near enough to the dog to visit every other day or so from day ten??? till...whenever??? All the best, Dawn

Ir alternatively ahve the bitch stay at the studs until she is willing to stand and be mated a couple of times.