Good Morning, I purchased 10 baby chicks from rural King. I noticed 4 of them had what appeared to be pasty butt last night. I soaked their bottoms in warm water and put olive oil on after I got them all cleaned up. I also have added ACV to their water. This morning 2 of them had passed. Could I have stressed them out or caused this somehow?? I feel so bad. Rural King will replace them. This is my first time having babies.