In a container or bowl with a lid - add chicken, pickle juice, whole milk, and yogurt. Mix and cover chicken. Let chicken marinate in this mixture for at least 2 hours, up to 24 hours.
When ready to fix, preheat oven to 350F. Preheat skillet over medium to medium/high heat, and add 3 Tbsp (a thin layer to cover the bottom) of canola oil to the skillet.
Grab three rimmed dishes - one for flour mixture, one for buffalo sauce, and one for panko. Flour mixture: Mix flour with salt, pepper and onion powder.
Dip each piece of chicken into the flour mixture, then into buffalo sauce, and lastly roll in panko. Then, place into preheated skillet with oil. Cook chicken for 8 minutes on each side, then transfer to oven and bake for 10 minutes. Check internal temperature: 165F.
Plate chicken with a (heaping) dollop of pimento cheese and chop a dill pickle on top.