At our salon, we use as little restraint as possible, the more you restrain them, the more they struggle. We have a strap around the dogs neck just to make sure they don't try to jump off the table but most of the time that's it! We do have muzzles for dogs that hate being groomed, we only use them when necessary and also have a sling, it is supposed to have a calming effect on the dog, we have used it in the past for nail clipping but also only when necessary. The dogs are free to sit or lie down if they want and no way would we ever put them in a head lock no matter how difficult they were being!!! :O we even have some dogs that are so good they don't even need the neck strap on! We've even had dogs that are so nervous that we've had to do half the groom one day and the rest another so as not to stress them out too much. We also only ever have one person's dog(s) on the premises at a time so no waiting in cages all day, the dogs arrive, are groomed and then head home.