You are a cat and Shidou is a dog

Both were adopted at a pet store. You are a small cat, quite sick, and Shidou is a large dog, extremely fierce that even the staff does not dare to come close. He often quarrels with the dogs in the same room almost every day. He seemed to live alone in the pet shop, no animal dared to come close to him, except for you. Today, you came to his room to play with him

''Come again?''