Popcorn and Caramel

Hi I have two boars Popcorn and Caramel they are both about 3 years old i have had them between 2.5 years and 3 years they started out living in a petstore cage they now live in a 2x4 C&C cage with a 1x2 upper level (hayloft). They have fleece bedding and the entire cage is 1 grid above the ground, I store hay/food etc. under it.I got Popcorn first and Caramel about 3 months later they are both from Petsmart I didn't know about guinea pig shelters back then. I used to use pine bedding before I got fleece. I put towels and newspapers under the fleece as underbedding. I feed them meadow hay and Nutriphase Gold pellet food i put vita-drops in their water they drink fine (and my vet recommended that). In my avatar Caramel is the skittish Abyssinian pale yellow one and Popcorn is the brown/black/white english/american one. Popcorn is not skittish at all but hates being picked up. Caramel is very skittish but doesn't mind once he is outside of the cage. Popcorn is more friendly but he bites other people if they try to pet him (but not me because I know what he doesn't like). They don't actually get along very well since they werent raised together but they never really hurt each other. Caramel's favourite food is Cucumber Popcorn's is Carrots. Their all time favourite is grass. They have two Igloos one big one small normally the small one isn't in the cage though. I made the a carboard version of one of those "timber something house" i think they're called.. and they have a wooden house in the middle. The wooden and timber house have carpet on top. the Wooden one has a rap attached to the top of it to get to the top level. They jump on top of there houses, They can both jump pretty high.