Buy dog food for your local shelter or rescue group. Often rescue homes/temp homes feed the dogs out of their own pocket. Nice to be able to cut down costs of folks who foster dogs.
Two years ago we had a successful training day/fundraiser. The club teamed with a local dog food store and we were able to turn $1,100 in cash into a pallet of canned dog food. This was the biggest request from shelters. Dogs in shelters often won't eat well and the canned food really helps encourage their appetite. Also stores well.