Polymorph messes with your brain and doesn’t make you do that tho

Maybe you wouldn’t, but IMO that’s half the reason to be a cat.

You’re a fool if you don’t think Sirius Black spent most his time in Azkaban licking his balls.

I have always played and DM’d that wildshaped druids can take their normal meal times like the animal would. So if they’re crossing a plain the druid could reduce the need for supplies by being a horse and eating grass