It's not that they didn't come in heat for round 1, its more likely they didn't get bred on round 1 and the does that don't get bred come back into estrus a month later.
Yeah I've looked into that. Maybe I'm not wording this correctly.
If there are two separate days with the same daylight length a month or so apart, why do the does not go into estrus on the first one. Maybe they've adapted to pass by the first one and goes on the second date. I just couldn't find anything on it and it had me wondering.
