Sierra is one big quirk! Everything she does is quirky!
When I give pig ears to them Sierra will lay down with hers in front of her and watch Bud chomp him down. Only once he's done will she eat hers and she'll take her own sweet time, as though she's taunting Buddy with hers.

I'd have to say that Bud's quirk would be the fact that he has to go outside 2 times a night to check out the yard. He'll bark at me till I get up and let him outside. He'll make a lap around the yard then come right back in.
This normally happens at about 1:30am and again at 3:30 or 4:00am.

My parent's dog Buddy Jr. mumbles, moans and groans in his sleep so loud that it wakes my parent's up! It's the cutest thing to hear when I'm there visiting and he takes a nap but my parent's often get annoyed with it and put him down stairs in his crate so they can get a full night sleep!