[header] How to train a greyhound [title] Buy a six foot nylon leash and a martingale collar. [step] A greyhound can back out of a standard buckle collar, so you will need to purchase a martingale collar for your new pup. You should never use a metal choke collar as this could damage your greyhound's throat. 
[substeps] You can find the leash and the martingale collar at your local pet store. A martingale collar is made up of two loops, a large loop that is adjustable and placed around your dog's neck, and a small loop, known as the control loop.