this is something that i keep reading about here on this board.i was born unto this breed 40 years ago and can not for the life of me ever remember any of our dogs having a problem.could this be a genetic problem? we have used different foods through the years and it has never bothered our dogs.what i do notice is when i can't get the dog food that our beagle club gets( Black Gold ) my father will use Big Red from Agway and it's not a bad food if you feed the right formula.my Father feeds the cheaper formula and the dogs are scootin' there butts on the ground.this has not happened to me when i used the Endurance Formula which is 5 bucks a bag more.i do use Diamond when i can't get the Black Gold.These are the 2 that i only use now.i feed 26% Protein 18% Fat,Black Gold "Black Bag" and have used the "Silver Bag" 23% Protein 16% Fat with very good results also,but i prefer the Black Bag.Now some people say that"to much protein is hard on a dogs kidney's" i think that is a lot of Bull unless your dog HAS Kidney Problems to begin with.i also have a 11 year old Brittany that gets the 26/18 food(Black Gold or Diamond) and is still in great shape with no sign of kidney problems,which some say higher protein food in older dogs is harder on there system,but you could fool me.the other thing also is no loose bowel movements and less of it to clean up than with other foods.these are just my findings over the years.a couple of things i do look for is food with NO SOY products,Meat or Meat Meal(this also includes Chicken or Chicken by products) as the first ingredient and it can not Have Meat and BONE Meal.i've found out that a strip of meat on a bone is considered this,bone is hard to digest!!!! this is what works for me and it may not work for you so you have to find out what works best for your hound.