Dao the stray who is now the boss

Dao came to us as a stray three summers ago. He was a small dachshund with skin problems and he was hiding behind the 7-Eleven near our soi. My mom said no dogs but I could not leave him in the rain. We took him to the vet first, the doctor gave medicine for mites and he needed a bath every second day for a month. The bathroom smelled like medicine for weeks but he was getting better and better. Now he is 3.5 years old and he is the boss of the whole house. He barks at the Grab bikes, he sits on my dad's chair, and he waits by the door for my mom every night at exactly 6. When I first brought him home he did not know how to walk on stairs. Now he runs up and down like a racing dog and I laugh every time. I think strays are the best dogs, they know how to be grateful. Dao shows it by sleeping on my feet while I study.