i was just thinking cos mate had litter out of lucky dog, got them tattooed sold a few then got em back about year later for free, but point i was making if the police dont scan your dogs (or look in ears for tattoo) how do they know whose dogs they are. Personally i wouldnt chip a working terrier anyway, its like leaving trail back to you if you have to run and leave dog when under. thats how my mate got caught and hes banned for life now, what an idiot. but for running dogs its a defo, cos even if your coursing and you have to leave your dog, it should come back to you, just say it was stole