i started noticing it a few weeks ago...but it grew little by little. coupled with the fact that jelly hasn't gone to the washroom for the 4 months i've had him, i assumed this was just part of a "backup"...but now i'm wondering otherwise and hence have been seeking your opinions. the vet appointment has been made (unfortunately he's not in until this wednesay evening) and i'll definately keep those who want to know posted. thanks for your comments/suggestions! i'm going to try keeping jelly as warm as possible this wednesday night on the way to/from the vet...it's already a snowy and cold winter here in toronto!