hi jack hope hes better mate I had the same problem with two kits from this year unfortunately I lost both of them the vet said its an infection but cant understand where they picked it up from i went out to clean them which i do every two days in the summer to keep the flys away and noticed the back legs dragging on one so checked him over put him in house so hes cool fed him with a syringe as he wouldn't touch nothing went to feed the others the following morning before going to vets n had another with the same took them both with me unforunatly didn't bring them home problem its puzzled me