The 11 puppies were 4 wks old on Monday. She bit one and that lil girl had to go to ER and nothing serious but a dislocated jaw and a cut on her tongue. Well the mom just bit another this morning. Mom was eating and the pup came up and wanted to nurse. She does not nurse them much...they have started eating moistened puppy food and are drinking water. We do give them puppy milk 3 times a day. Should we keep the mom and pups seperated now?