We have a 3-4 brands of hot dog in my area, that ar mde with natural casings, or at least casings made of meat itself, just like in the old days.
They are about half again as long as national brands, and more costly, being made by specilty companies.
There is one brand I will not buy..since they are obviously very cheap (85 to 99 cents for 12 oz) and likely have much "fillers". I do get them for my old dog...she gets about half a hot dog sliced atop her dry food, and seems to look forward to it.