Hello all, pretty new chicken raiser, have 2 3-month old New Hampshire reds & 7 mixed breed baby chicks. Made a pvc feeder w 2" pvc a few weeks back, just changed the design & I keep noticing red stuff on top part of pvc. I clean it off and it will be there the next day. Maybe should have made it 3" so his head & comb can all fit in. Is this normal?