I'm in vt and Keep pairing even after the heat goes back to normal until April. So my breeding season is generally from oct to feb or nov to April. Also before I stop them I look for signs from both the male and female that they may want to stop on their own. Ie them just not being interested in each other any more or ovulation etc.
I have 2 girls with big follicles now, and 3 from last season who didn't lay until Aug., Sept., & Oct., and 3 more that who knows what's going with them lol.
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"The greatness of a nation and its moral progress can be judged by the way its animals are treated." - Gandhi