I was in the kitchen the other day whipping up a gluten- and dairy-free meal for my family when it occurred to me: Shouldn’t I also be cooking up some healthy treats for our dog, Mystic? After all, the dog snacks you buy in stores have the same problems as the prepackaged foods we humans often buy for ourselves: dyes, preservatives and unpronounceable ingredients.

Homemade dog treats, on the other hand, are healthier, made from wholesome ingredients, and …