If you see more hairloss and scabs it could be fur mites. Fur mite scabs are typically yellowish-white and there’s also as a rule some dandruff around the site. Fur mites are common in rabbits and the best treatment is Revolution (selamectin). Don’t use fipronil (Frontline and other brand names) on rabbits. It’s deadly toxic to rabbits, so we always issue this warning when somebody mentions possible parasites.

But it’s normal for buns to shed in patches sometimes. I’d keep an eye for now.