I have a Maltese (4 years old) and about a year ago, she started to scratch. I often carried her in the house because she can’t really come down the stairs. Anyways, I found out that there’s something going on with her skin so I took her to vet. She took a shot (don’t remember what it was called) and also got a special type of shampoo to kill any bacteria and prevent them from spreading. However, it didn’t work.
I did more research and I was thinking maybe she was allergic to food. So I changed food (can’t remember but it was quite expensive…it was all natural without any meat in it so I had too cook chicken breast and chopped it for her) but no luck.
She is completely shaved right now and I can tell that her skin has darkened where she had skin problems. It is awful and vet seems to be very clueless. Her skin becomes red and I can see some blood but very minimal, then I see scab. It repeated for a year now.

I moved to a new home so it can’t be a bacteria from carpet and I rarely take her outside so it’s not something from outside.

Can anyone help? Thank you for all the responses. I really appreiciate it.

None of my family smoke and the house is very clean.

Just to clarify, she is NOT losing hair. I shaved her hair so that I can easily see what’s going on with her skin. I was told to remove scabs as soon as possible because apparently, that’s another way of bacteria to jump from one place to another.