Wow he was up early! He really has his thinking cap on pondering it all. I did not think he had the anal sac carcinoma from the histology plus I thought Woody had a history of colitis for a few years? Couldn't the colitis just be flaring right now after all the stress he has gone through with the recent surgery etc and maybe that could also be causing the straining. Just trying to think it through without it being anything nasty. I guess if all those sympoms are all caudal then they might fit. Was he scanned prior to this surgery? I cannot remember. Silly buggers leaving the cannula in but I guess in the stress of an emergency it was just overlooked. You are going to need a Nana nap today with this sleepless night and early morning!