Sighthounds benefit greatly from a good fitting Martingale collar for lead walking. Because their heads tend to be the same width as their necks, regular collars can slip off. A Martingale collar is designed to tighten gently to a stop point, to prevent slipping and without causing discomfort.
Martingale collars should only be used while the dog is out for lead walks or when supervised, so a house collar is a good idea for changing into when at home for roaching, rooing, chattering etc. An id tag can be attached to all collar types.