When I was concerned that Meep might have a partial blockage the vet advised me to give him Kitty Malt (hairball laxative that I have used) every 1/2 hour for 3-4 times. That if that didn't produce anything in the stool it was likely there wasn't a blockage OR that if there was a blockage it wasn't going to pass. Meep had dropped from 2.0 to 1.6 lbs, had been less active than normal and his stools were varying in size (smaller) but otherwise seemed normal. The laxative didn't produce anything and we had him x-rayed (which I was told many times won't show a blockage either) and that also was negative. We watched him closely for about a week but he has gone back to being normal in every way again so I don't know what the problem was before. I guess that's a long way of saying, try the laxative and see, but if you don't see any results I would pursue having him checked for a partial intestinal blockage. That's a lot of weight for a little guy to lose. Karla Meep and Daisy [Posted in FML issue 2336]