Still thinking of you. So heartworm was negative, but may be cancer - Hobson's choice really, isn't it? Glad there are some positive signs in Sam's behaviour, he seems like a fighter! Will continue to watch as things unfold and hold you and all the other sick kitties on PT in my thoughts and heart. My girls have their annual checkup tomorrow, I'll definitely be asking about feline heartworm - wonder if it's worse in USA than Australia? I'll give feedback for other Aussies on the site. Best wishes PS-remember to take care of YOU too!