Housing

I have an emotional support German Shepherd who my landlord wants to evict. Is it legal for my landlord to evict my dog?

I had two days of long shifts and asked my Grandma to watch the dog for the day, and she re-homed him. The new owner got in a car accident and returned him. My Grandma didn't tell me this amd the dog began living with my Aunt. When I asked for him back my Aunt was beside herself, so I told her she could keep him only if she gave him back if need be.