We had 5 ducks (about 3 months old) that were attacked a week ago yesterday, we think by raccoons. We had 2 survivors. One as been doing all of her normal daily activities and seems completely fine. The other has not been moving around much, not eating as much, i havent seen her in their pool or preening and she is losing feathers. Can this be separation anxiety and if so is it a good idea to introduce new ducks to make a new flock?