i did start getting them fit again a few weeks ago,but i have put it on hold again due to the heat,the reason you cant keep them tip top imo is because the heat absorbs energy from a dog like mad,they knacker themselves out just by trying to keep cool, panting,plus i find they go off their food,so if you put a hard exercise regime on top of this in the heat you will exaust the dogs,unless you dont work that is,if you dont work for a living then you can do all your walking early in the morning.