delta tail betta

My beautiful Pisces hasn’t been eating for almost a week. I tried feeding him freeze dried food (bloodworms, aqueon color enhancing pellets, mysis, daphnia, and even live bloodworms) nothing i feed him has worked. I tried the garlic treatment that helped a bit and he ate one pellet but that...

Could this be a possible start of Dropsy? I've never had any sort of problems with him and I'm concerned about my delta.