Sounds like it was diet related. I'm glad you solved your problem. Just glancing at your very long list of meds, deworming stands out as something that commonly causes diarrhea and should be carefully dosed and spaced out if repeated. For anyone else reading this, it's important to let your cat...
This is an old thread, but it looks exactly like the stray kitten I'm fostering. Our kitten has a fungal skin infection (ringworm), which feeds on keratin in the skin and fur, leading to frail and dry skin that falls off easily. Treatment varies, but from American online content, a standard...