The Troublesome Adventures of Oliver the Dog

Hey guys!
Okay, so, this is a story about, you guessed it-Oliver, the Dog! This will be written from Oliver's point of view, so I'm putting what he looks like here. I'll probably change this to a actual book description later, though!
Oliver is a 8-9 month old puppy. He is a short-haired Border Collie/ Beagle mix puppy. He is mostly white, but has black spots on his back and black dots on his belly. He also has some black around his eyes and ears, making him look like he's wearing a mask. His behind left paw front right paw is covered in black, making him look like he is wearing shoes on those paws.
Alex Matthews is a 14-year-old girl with dark brown hair and brown eyes. She is five feet, three inches tall.
Drew Anderson is a 15-year-old boy with light brown hair and green/blue eyes. He is five feet, five inches tall.
Remember: This is unedited, but I will probably edit later! Remember to give suggestions, ideas, questions, comments, criticism, and anything else that could improve my writing!