Mouse over for larger view. (May take a few seconds to display.) 3 pk (8 weeks or older, up to 22 lbs) 6 pk (8 weeks or older, up to 22 lbs) 3 pk (23-44 lbs) 6 pk (23-44 lbs) 3 pk (45-88 lbs) 6 pk (45-88 lbs) 3 pk (89-132 lbs) 6 pk (89-132 lbs)