i have a five yr old dwarf lop.a few weeks ago i noticed he had lost a mass of weight and was litually skin and bone.i took him to the vets ,she could not see any apparent reason for this as he was active,still eating and drinking.(he shares a cage with his sister who is same age and a fat little thing)the vet gave him antibiotics incase there was an underlying infection.he has put on weight although you can still feel his back bone.over the last few days he has become very wet down the front of him and seems to be pulling at his fur on his front legs.he is still eating and hoping around but hunches up in his cage and just does not look himself.please can anyone help.