Similar to a case I'm currently looking at, handled by you 2 years ago; I have a 8 y/o female, English bulldog, that has gone from mild, to accelerated hair loss, on one side of her body. This started about 7 mo ago, on both sides, but appears to have subsided on her right side - and gotten worse on her left. My Vet, where I also carry my dogs insurance (Tuta) - has already done a scrapping to rule out mites - and has loosely determine that she has some sort of seasonal allergy; but nothing has been prescribed to help combat the issue. Tuta spends her days rubbing up against furniture and rough/hard surfaces to relieve her itch - there has to be a better way. My wife and I have changed her food to both Purina and Rachel Rays Salmon mix - but nothing has changed.
Your article makes mention to the use of Melatonin, in these cases. We need some direction with explicit steps to follow. ( Please see attached picture of Tuta's side)