Groot is the long-haired guinea pig, while Bucky is the short and smooth haired guinea pig. These boys have almost been with us for around a year now. Bucky is the more confident one and we think his confidence will really start to show once he gets into a home environment. Groot on the other hand is the shyer one. Groot’s hair can get very long, so you’ll have to make sure he has it trimmed and to ensure it doesn’t get too long around his bottom!