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JJ thanks, and he uses a nice big covered in litter tray :) Prudie, thanks for that. I'm sure that is what has happened cos he was chasing it for ages then my daughter found it lying dead in the hall so I presume he caught it, but I'll keep my eye on him. Roughquest, like I say he's an indoor cat and there isn't anything he could've injured himself on in the house for it to develop into an abcess, but I am keeping a careful watch on him. BM, that's a shame about your old girl, wee Rufus is only 2 and strong as an ox so hopefully he'll be fine but I may just phone the vets for advice like you say. Wolf, my great aunt actually trained her cat to use the toilet and flush it - I suppose the flushing bit would be the easiest since they would just use the same motion they do to bury it ;)