Customer: “I think my dog is allergic to this food I bought here.”

Me: “That’s too bad. Would you like to exchange it for another kind?”

Customer: “It’s the fish in it. I thought fish was good for dogs.”

Me: “It is unless they are allergic to it, every dog is different. Why don’t you try this one? It has duck in it.”

Customer: “Duck? Duck is fish!”

Me: “No, it’s not.”

Customer: “Well, what is it then?”

Me: “Ducks are birds.”

Customer: “But they go in the water!”