Arrow is Pipsqueak's 2 Year Old Pet, given to him in 2014 (in Season 4,) by his Now deceased Grandmare Squeaks. He was The Last thing given to Pip by his Grandmother, before she got in a Carriage Accident. Pipsqueak loved his Grandma Very Much, and it broke his heart hearing she past away. He has since became Emotionally Attached to his Pet, and plays with him sometimes.
I thought about giving Pipsqueak a Pet, too try too make him more Likable, Fleshed out, and Relatable. Which is something I'm doing for some other Characters in My Story as well. The Six Knights of The Night, is pretty much a Character Driven Story, which considering The Main Characters aren't Twilight and her Friends, is probably a Good Move for My Story.
Why a Wolf? I think they might be My Second Favorite Animal (First being Owls,) so I figured why not? If Twilight can have a Pet Owl, Pipsqueak can have a Pet Wolf.
Anyway, I hope you like This New drawing of Pip and My New MLP OC too be a Pet to Pip. :)