My husband and I got our chicks yesterday brought them home and set them up in the holding area in our bathroom until its warm enough to move them back outside ( and after our local raccoon decides it wants to pester someone else ). This morning I checked on them to make sure they still had water and food and let them splash around in their bath when I noticed that one of the chicks has poop or some other black green substances caked around her nails, its hard and seems like it doesnt want to come off. Any tips on how I should go about cleaning this, Im new to raising chickens and dont want to hurt her.