
All breeds, including whippets can be trained. there is even a Whippet Obedience display team.
What has to be remebered that you have to realise what the breeds inclinations are when free. A herding breed will circle, so is usually not far from the owner. Other breeds are easily distracted by scent (mine have alwasy got their heads down, or noses twitching air scenting) and sight hounds will run after a moving target.
Normally they have no intention of running away from you, they are just totally distracted and forget all about you, this is where training comes in, making you the dogs main focus. so if they do mtake off, somewhere in their little brains the training will register when you call, even if not staright away in full flight.
Teach the dog to come to you as soon as it is too far from you, when there are no distractions, taching him to watch where you are.
With breeds that tend to range a bit ahead of the owner it is always wisest to only let off lead in relatively large safe areas, so that they cannot get ahead into danger, before you can see and stop them.
Nyt youngest bitch is not as reliable to recall as I would wish, so I let her free in the Country Park, but keep her on a flexi in some of the small playing fields that are close to roads. I know the older ones will stop if I shout wait, and also know that they have to wait at the gate, and not go in the road.
So really it is lots of positive training, training and more training. Just tailor your training to suit your breeds instincts. I would imagine visual cues from you to get the dogs attention off another moving object may work well. A fluffy small toy that you toss, so that it wants to chase that. All dogs are different. Try to find training classes where the trqainers have experience of a wide variety of breds, and what makes different dogs tick. Unfortunately many trainers now only understand the collie/GSD and other herding/guarding breed mentality, and have learnt to gear training methods to dogs who think that way.