ya can tell a worker will have marks and scraches and skuffs off going thru gates and crashing into dyke or nocks it gets [bANNED TEXT] running a non workerr will hardly have a mark on it
not always, i've seen pets that have never worked stub a toe going up stairs or tear itself chasing a ball in the park and some veteran workers that hardly have a mark fact is some dogs are more accident prone than others worker or not, i've found that a dogs demeanour says a lot an experienced worker who's been there and done that usually has an air of confidence about it often even a bored look about the