ROB, I USE THE BLUE BAG YEAR ROUND AND NEVER HAVE ANY PROBLEMS WITH STOOL, IF YOU WORK YOUR DOGS IN THE SUMMER IN HUNT TESTS AND APLA AND TRAINING THE BLUE SHOULD BE JUST FINE, IF YOU NEED TO KNOW MORE CONTACT DALE MERRIT , HE IS VERY KNOWLEDGEABLE ABOUT THIS AND WILL HELP YOU ANY WAY HE CAN! KEVIN |