My son is at a special needs nursery. He's in a room with five other children on the spectrum. One of the children has been biting (not his fault I know) but when he bites the nursery restrain him in a chair. When I say restrain I mean sit him in a chair with a clip belt type thing like a buggy or high chair. Anyway they sit him in that and strap him in. Is that ok? Should I tell his mum? Am I over reacting to think this shouldn't happen?