Preheat the grill to medium-high heat.: The air is warm and you will hear the faint hiss as the grill reaches temperature, which ensures a quick sear and prevents sticking. A properly preheated grill gives a satisfying char and locks juices into the formed chicken dogs, creating the contrast between a slightly crisp exterior and a tender interior. If the grill is too cool, the dogs will dry out as they cook longer; if it is too hot they may char outside before cooking through. Aim for medium high so you get a steady sizzle without blackening.
Make the buffalo sauce. Combine the melted butter, 1/2 cup hot sauce, seasoned salt and pepper in a small bowl. Whisk to combine.: You will smell the warm butter and tangy vinegar from the hot sauce bloom as you whisk, forming a glossy, orange sauce that clings to the chicken . Whisking emulsifies the fat and sauce, giving a silky mouthfeel that coats the meat. If the butter is too hot it can separate the sauce, so let it cool slightly before combining; if the sauce looks grainy, whisk vigorously to bring it together.
Add the ground chicken, parmesan cheese and panko bread crumbs to a bowl. Pour in a 1/4 cup of the buffalo sauce. Mix everything together until just combined, do not over mix. Form the chicken into "dogs" the size of your buns. I was able to make 6 dogs about 5 inches long.: As you combine the chicken mixture you will feel the slightly tacky texture that signals it will hold when shaped. The parmesan and panko add structure and umami, while the buffalo sauce seasons the interior. Over mixing compacts the meat leading to a dense bite, so fold gently until everything looks cohesive. When shaping, press evenly so each dog cooks uniformly; a common error is packing too tightly, which prevents a tender crumb.
Grill for about 6 minutes and then rotate and grill another 6 to 10 or until the chicken dogs are cooked through.: You will hear a steady sizzling as the dogs sear, and the surface should develop light grill marks and a firm spring when tested. The aroma becomes richly savory with a hint of buttered buffalo tang. Rotate gently to get even color on all sides, and use an instant read thermometer if unsure; chicken is safe at 165 degrees Fahrenheit. Avoid pressing them with a spatula, which squeezes out juices and dries the meat.
While the dogs are cooking make the spicy avocado ranch. Combine all ingredients in a food processor and blend until creamy, scraping down the sides occasionally when needed. Taste and season additionally if desired. The avocado ranch can be stored in a seal-tight container for 1-2 days.: The processor transforms ripe avocado and Greek yogurt into a luxuriously thick, pale green sauce that smells herbaceous and slightly tart. Scraping the bowl ensures even texture and prevents small lumps of avocado that can create an inconsistent mouthfeel. If the ranch is too thick, add a splash of water or vinegar; if too thin, chill briefly to let it firm up. Avoid over blending, which can turn the sauce too warm and less vibrant in flavor.
To assemble the dogs spread a little avocado crema on the toasted bun and sprinkle with blue cheese. Add the chicken dogs and top with equal amounts of shredded cheddar cheese. Place on a baking sheet and broil for 1 minute to 30 seconds. Top each dog with the avocado ranch, shredded, lettuce shredded carrots, blue cheese and the remaining buffalo sauce. Eat!: When you spread the cool avocado crema on the warm, toasted whole wheat hot dog buns you get an immediate contrast of temperature and texture, and the crumbled blue cheese melts slightly against the hot chicken dog releasing tangy pockets. The brief broil melts the shredded cheddar into a glossy, molten layer that ties toppings together. Be vigilant under the broiler since melting can go from perfect to burned quickly; watch closely for the cheddar to just bubble and avoid prolonged exposure that dries the bun. Finish with the crisp shredded lettuce and carrots for a lively crunch and a drizzle of the remaining buffalo sauce for a bright finish.