ok, 7 month hen. noitced a bumble yesterday and did surgery. it was just big enough to start her limping. I check my girls every week or so for them. Last year i had a go around with my year olds. 4 had bumbles (not huge, but big enough for me.) i finally got the last one cured after months of attention, now this one! I can not seem to figure out WHAT is doing this to them. Their coop is meticulous. gets cleaned daily (10 X 8 shed). outside does have a few wets spots, but has straw on it. no standing in water or mud or such. have fresh grass, in a pine bough for shade, etc. any clues? I am so stumped. i wondered if pine cones might have been the culprit last year, so i cleaned them all up under the pine trees. The get out to free range almost daily as well.