id call the vet to be sure, BUT, other than some agrivation (and likley a sore throat for a few days) i doubt itll doo too much harm, itll take some time for all those tiny "sticky" hairs to clear out so dont be suprised if he drinks frequenlty trying to clear them all out.
theres no venom in the shed/hairs so no worries there, itll definatly be agrivating though.