I had some strange stuff happen. I have a large stacked brooder, but when I get a small hatch like from my broodies I put them in some tank brooders I have. In the last few weeks I have lost 3 young chicks. All three were bloody and I assumed the hatch mates got to pecking on them and then when they got blood they pecked till they died. Day before yesterday I walked into the brooder house and there was a large green shiney bug (like a large june bug) latched on the butt of one of the little chicks and had drawed blood. I had to pull the dang thing off. Today there was a large black bug that was attached to one of the little buggers butt again. Has anyone ever had this happen. Now looking back I would say the bugs is what caused the problems from day one. The brooder house sets under a night light and lots of bugs fly to the light constantly. Then there is lights in the tanks. I assume the bugs are attracted to the light. I moved one set to the big brooder so they are bug free. Have 6 left in another tank. I will rig up some sort of screen on it. CHICKENS ARE SUPPOSED TO EAT BUGS, Not the other way around.
Okay, that's weird. I've never heard of it before. I sure am glad you caught them though. Bugs need to RTFM.