i have a 14 month old Welsummer hen, who is in poor health. It started this summer. In July, the hen became very pale, and lethargic not eating any food or drinking. After bringing her into the garage with sugar water, and feed, she slowly began to eat (starting with an apple). She perked up after a week, so i put her with the rest of the group which contains 8 other hens. She seemed slower than the rest of the group, and remained pale, never regaining color. Yesterday when i went out for my chores, she was lethargic again, still pale (since summer), and became spooked and went to run and fell over. in the run, she proceeded to sit all puffed up and kept falling asleep while standing. she had only swollen ankle. not the most tame chicken, i picked her up, and the was listless and limp. i put her back into the garage in a crate with food and water. the next day the perked up a bit, and snacked on an apple slice. now both of her legs are swollen. she has no sores or cuts, or injuries to her body or legs. it is winter and i live in Michigan, keys concerns: - summer episode began in july - it is now december and hen has been pale since july.... -became lethargic and pale in summer, - perked up but remain pale and quiet - yesterday became pale and listless, falling asleep standing with swollen legs - the chicken can walk normally, does not seem to be in pain and is not limping or hobbling. - its odd once she is in the garage, she seems to perk up???? - got the welsummers and some others from privett hatchery 14 months ago. i feed Dumour layer, give grit, fresh chop feed, with some oyster shells. the snack on lettuce and apples depending on the season, and when i don't have time to let the out, i put grass for them to eat., no other chickens seems to be ill. my only idea is a bad heart/weak circulation? i am stumped!!! please help!!!! THANK YOU!! i discovered a possum has been steeling eggs( caught him red handed) and i have a trap set, but have seen no sign of him since i spooked him.The trap is only set when the chickens are roosting, and has not gone off so i dont think she was injured. the chicken shows no injuries.