Well its winter so that causes many BP's to go off feed. When females beging their breeding cycle that will make them go off feed. I have found that ambient temps under 82 degrees can cause many to fo off feed. I would chaulk it up to the time of year. I definately am having more refusals that other times of the year. Then again I have many that are approaching ovulation so I wouldnt expect them to eat much. Some are going every other week. As long as they are healthy I wouldnt worry too much.