I have a two week old Bantam mix chick who started limping yesterday. Today she can't walk at all. She aso has labored breathing. I had a Silkie die of Mareks in September and the way the chick acts resembles Mareks but from what I read she is too young to show symptoms. Can anyone help? She's eatting unmediated chick starter and nibbles on scraps I throw her momma (biscuits, fruits, veggies).