Please help! I have 4 established hens (1-RIR, 1-EE, 2-silkies, all layers) and 2 weeks ago added 2-EE. The 2-EE are 2 months old and have taken up residence in the laying nests and are using it as a TOILET. As if chickens weren't nasty enough, this is a new low! I am pulling my hair out - what can I do??? HELP!