So sorry to hear about Rufus, Anna. Being a curious devil, I just wondered whether you have discussed this with his breeder and asked if any other pups she has bred, especially Rufus's littermates have been afflicted in the same way, or similar? Just a thought. Hopefully the specialist will be able to throw some light on it anyhow and it won't be anything that can't be 'mended'! Positive thoughts coming your way. Keep your chin up - as best you can. x