I currently have 5 Coturnix quail chicks that are 3 weeks old and one of them keeps having these episodes/seizures where his head shakes violently and he reverses with tremendous speed. 2 others had extremely crooked feet and died at about a week old and I had to put the other crooked one down at 2 weeks old due to breathing difficulties. Could these deformities/disabilities be caused by inbreeding? I ordered the eggs from Exeter so my current birds aren't the problem. Any help would be invaluable.