pasty seems to be an issue mostly for me when they get too chilly. I never have that problem with my own hatchlings, but shipped chicks get it a lot. I clean the butts and wipe a little vitamin E ointment on the vent and surrounding down to help keep the poo from sticking in the future. Seems to work great. I have 37 shipped chicks in the brooder right now. Lucky for me the last couple days while they were in transit it was nice out since the hatchery didn't send a heat pack with them this time (they did with the batch USPS lost in Feb, little good it did though - this shipment was my replacements for the loss on that shipment). Kinda glad that I have these babies for Easter weekend since what would have been my Easter hatch got fried when our friends' kids tampered with the incubator. Exciting thing about this shipment is they appear to have sent me a "mistake", but a rather happy mistake. I ordered bantam white crested polish and one of them is solid white! I am unsure if this was a picking mistake on their part (just reaching for a white crested head when packing) or if it is some kind of genetic anomaly. I'm really hoping for pullet though, cause I wanna keep it!