What "single-ingredient" actually means.
"Single-ingredient" gets used loosely on dog-treat labels. The honest version is simple: the bag contains one thing, and that thing is what's named on the front. Chicken breast means chicken breast — not "chicken-flavored protein," not "chicken meal," not "chicken plus a binding agent."
Why does this matter? Two reasons we care about as physicians. First, when a dog is sensitive to something — a particular protein, an additive, a preservative — single-ingredient treats let you know exactly what they reacted to. There's no "natural flavor" hiding the variable. Second, the simpler the input, the easier it is to feed responsibly. You can match the ingredient to what your vet recommends, what your dog tolerates, and what you'd want them eating.
The flip side: shelf life is shorter. No preservatives means a Dogtors pouch lasts 3–4 months, not 18. We're fine with that trade.