We unfortunately have had two cases in which our chickens have been witnessed by my husband as having glumped down wolf spiders without pecking and killing them first. Both of these died of the same symptoms within 24 hours. They became discoordinated, started vomiting, had breathing difficulties and died very quickly. We don't know if these little bastards bit them on the way down internally or what, but it is too much of a coincidence to not be related. Both of these are basement pet chickens and we don't usually like pesticides but have had it and are moving them out of the area temporarily and spraying the living daylights out of the area. Nothing will be left alive. We aren't losing another of our pets to this. It has always happened when their cage has been opened for scooping (done 3 times a day here) and they hop out and grab one of those buggers before Mark can stop them. So sad. We just lost Harriett the other day to this and poor Henrietta her cage-mate is in mourning and keeps looking for her. There are a ton of them down there and last night Mark starting killing them and one was not splattered too much for ID-ing and that is what it is. That combined with very greedy chickens spelled disaster so be careful if you see them.