I totaly agree about the funtional size of a working farm dog heavy dogs can't run for long with very few exeptions people want bigger dogs to sit on their couches to have  the biggest useless dog and if it costs them a small fortune they have more to brag about then they feed it as much as they can so you could never feel a rib and get upset with me when i tell them that you should be able to feel the ribs easely no mater the breed that there  limping artritic dog would be much healtheir if it lost 20 pounds. A hunting RR should be lite and fast because even if you had a two hundred pound beast it will die if it fights a lion the key is to have enough balls to harass  the lion and fast enough to get away when then lion comes after them or you would need new dogs every hunt.