I was given a baldy cow with newborn.Everythings been fine for the past 6 weeks with mom and calf. During this time I bonded with mom and she trusts me to groom her now. And I found hair loss on her neck and top of neck. And now the calf is losing hair on her neck and ears. But the tips of her ears are raw. Its not cold in the barn where I keep them. I keep a very clean and heavily bedded stall. I maintain them like well kept horses. I picked up lice away but that is not working. Help! What should i use?