Welcome, btw! We do love pictures so please post away!
Not sure why the poop was stuck on the bunny to begin with, but its always a good idea to have a rabbit savvy vet do a checkup with new bunnies. Make sure to take a fresh poop sample — its not uncommon for young bunnies to have coccidia which can start as sticky poop (can be stinky) and progress to dangerous diarrhea if not treated.
Bunnies (all ages) also produce a second kind of poop (cecals) which looks like very dark tiny clusters of grapes or like a blackberry as opposed to normal cocoa puff looking bunny poop. Normal bunny poop doesn’t stink, but cecals reek! You usually won’t see bunny cecals because they eat them right from their rear ends, but you may occasionally see one now and then. Lots of uneaten cecals can indicate a too rich diet or other problem.
Take a read through the Bunny Info section (through the menu button at the top of the page) for lots of helpful bunny info!