When you use your dogs 2/3 times a week over a period of years, anything that helps maintain their enthusiasm is beneficial, when they know you want them as much as they do, some dogs work better for you, than for themselves on their off days, It can with some bring out the best in them consistently, instil this in a pup, once I know he knows it, then there is no need. I always do this with all the pups until they are about 1 1/2,. Just my way, works for me. A hobby dog ( take out couple of times a month) is a bit different imo.