I think we have at least one runt in a litter right now. Should just leave it up to Mom and nature? or should I be taking out the fat ones for a feeding to give the runt a better chance? or should I get mom and have her feed the runt individually? or should I look into kitten's milk (like KMR) and do hand feedings? This is her first litter. She is a new zealand/rex mix I think or something like that.