Vital Wheat Gluten Powder, For Pet Food

Gluten is the protein found in wheat. Its what gives bread its shape and pizza dough its elasticity. Vital wheat gluten is just the protein in a powdered form. It is made by washing wheat flour dough with water until all the starches dissolve, leaving just the gluten behind. No, there is no substitute for gluten, at all. The gluten + soft flour combination is itself a substitute for bread flour, so if you can get bread flour, as Catija suggested, use it. If you can't, you need another recipe. Especially if your goal is to "not make it complicated", don't use substitutes