Merrick Summer Seasonal cans Merrick has announced the introduction of its Summer Seasonal cans formulas. These grain-free formulas include Camper’s Delight, Honolulu Luau, Ballpark Bonanza and Red, White & Blueberries. They are expected to be avaialable shortly after you read this, perhaps sooner. Sold in a 4 pack with one can of each flavor- $10.50.