Prelay shed comes about 21 days after ovulation (which is when she becomes gravid and will stop mating) if she was just locked with a male a week ago - then she likely didn't ovulate 21 days ago and therefore is not gravid and having her prelay shed. Keep pairing her up until you see ovulation or she stops mating.
Yes - you can pair her up with a male while in shed or wait - doesn't really matter if they are in the mood they'll lock. You can also check for follicles while in shed if you want - or wait.![]()