If it’s a pregnant doe, the babies will come within a couple of days. Pregnant does pull fur and make a nest very late in the pregnancy, often the day before the kits are due.
Unspayed does are rather prone to false pregnancies. That means their body “believe” it’s pregnant. The doe makes a nest, pulls her own fur (it loosens from the skin due to hormones) and then there are no kits and it all resolves.
In a male, fur pulling could be due to the stress of being in a new home. It doesn’t have to be “bad” stress, just the stress of an unfamiliar environment.
Territorial poop from both bucks and does, neutered or intact, smell like onions. A bunny in a new environment needs to mark the territory and will thus produce onion-smelling poop. Territorial poops are slightly bigger than regular poop and often shiny. The shininess is from the oil that holds the oniony smell.
If he’s eating and drinking, pooping and peeing it’s not an emergency.
You will know very soon if she’s pregnant. Keep an eye on her, give her a nest box (can be a very simple cardboard thing, if there really are kits you can exchange it for sth better later). Don’t place the box so that the kits can fall out of it, they need to stay wrapped in mama’s fur so they don’t get cold, because a mama bun doesn’t lie with her kits like a cat or dog mama does. She just feeds them twice a day and hops off again.