Puppy Love- Puppy Hybrid V x reader

You work at an animal shelter where an overly hyperactive ginger puppy has been dropped off. It has been several months since he arrived, there are no more spaces in the animal shelter and he hasn't been adopted once. Because he hasn't been adopted, you decide to adopt him to save his life. However, after greeting him home, you realise a secret he has been hiding all this time. What will happen when you know?