Eating more?

[Catty1]

Could be thyroid, start of diabetes or a tummy worm - or just a phase.

Make a vet appt, and take a stool sample in with you and Stormy. The sample can be checked right there.

The other stuff will need bloodwork.

I hope all turns out well.

[aTailOf2Kitties]

butt-dragging may also be a sign of anal gland issues. He's neutered, right?

[Freedom]

At my vet, I drop in with a cat and get a weight, no charge, no appointment. I usually go in the mornings when they are doing surgeries, so there are no appointments, the exam rooms are just sitting there empty.

I know it is a nuisance to get the cat in the carrier and take him over, howling all the way if he is like mine. But it is an idea, and I've done it a few times over the years when I was wondering about stuff.