Happi Doggy Dental Chews prevent bad breath by killing bacteria and have 4 times the brush bristle. Its orange content helps to maintain the collagen in the gums and is a good source of fiber. It also helps to strengthen the immune system and improve blood circulation. These treats supply your pet with vitamins A, E, M, H, and C as well as Omega 3 and 6. They also help ease arthritic pain in canines.