I am currently transitioning from Diamond Premium Adult formula to Eukanuba Premium Performance Sporting
http://us.eukanuba.com/eukanuba/en_US/jsp/Euk_Page.jsp?pageID=PRDD&BS=P&PID=15

20% more Protein and Fat: Made with more protein and fat than Eukanuba Medium Breed Adult to provide sustained energy for peak performance
DuoEnergy®: Eukanuba Premium Performance Sporting formula has a special blend of carbohydrate sources, fats and L-Carnitine to help provide sporting dogs with quick and sustained energy
JointFlex: Natural sources of Glucosamine and Chondroitin Sulfate to help maintain joint and cartilage health
Antioxidants: Made with antioxidants such as Vitamin E to support your dog's immune system
Chicken is the #1 Ingredient: Real chicken as the #1 ingredient provides an excellent source of protein
No Unnecessary Extras: No fillers, artificial preservatives, artificial flavors or colors added
Natural Fish Oil: Natural fish oil provides Omega-3 fatty acids for healthy skin and coat. These nutrients also help support the immune system and nervous system
Healthy Fiber: Made with beet pulp fiber to help maintain a healthy digestive system
DentaDefense®: Crunchy kibbles with a coating of micro-crystals scrub your dog's teeth with every bite, reducing plaque and tartar buildup that can lead to bad breath