Hi, I got my chickens on Tuesday and so far, so good, except that there was a bit of runny poo in the house this morning and also one of the hens has a dirty bottom. She's very flighty and in an Ark so I can't catch her. Should I be worried? She is behaving ok otherwise. Also, I spilt some diluted poultry Shield on the eggs - do I have to throw them away? Thanks....