A few days ago, Pippin started with a barking cough when he gets excited. We took him to the vet yesterday and they performed an xray and saw "something weird" near his tracheal branches. Results came back from the radiologist today, and they indicate either a tumor or a bad fungal infection. We'll get more info on Monday and line up a CT to confirm.
He's otherwise in great spirits and health but we're worried like hell for him. Positive vibes appreciated.