Like most athletes, the young Greyhound champions require adequate nutrition. The rearing of the young Greyhounds differs from trainer to trainer but the result is usually a healthy and robust racing dog
Some trainers let the young dogs run freely in the first year, eating at will. Others prefer giving litters the benefit of sizeable paddocks with shelter - both methods usually develop the young dogs with strong, healthy limbs and cardiovascular systems.

There is really not much science involved in rearing it is simply aimed at getting the young dogs safely through their first year, providing the right nutrition to get them fit to their exercises