i had girls that would refuse when they were being paired but after a few of pairings they began to pound food like no other. i also have girls that have no eaten since breeding season started and ones that have not gone off feed at all. If shes looking to thin and isnt up to breeding weight then hold her back this year. No point in risking any health issues from her if shes under weight. also the girls will go off feed when its close to the time to drop the eggs.Females can produce follicles even if they were never breed. they can even lay unfertilized eggs if theyve never been paired with a male. One lock is enough for her to get preg as long as the male does his job.