Working strains of Bedlington can and sometimes do suffer from copper toxicosis, though thankfully are usually in a different league constitution wise to the fluffy white imposters.
Also, Rambo was a one off, a throw back, and Stuart actually bred many litters of hybrids.
maybe stuwart did breed from rambo [cross breeds]but john bred rambo mate not stewart.and mine were from rambos litter brother and rambos grandaughter and they grafted good if anything to hard,prety good for pure breeds i should think.but yes its rearly the working ones end up with copper toxicosis thats why they have a