I have a short haired silver agouti American GP named Tara, around two years old. Her cage mate "sister" is Bamboo, a black and white Teddy, also around two years old. I've had them since 8.18.2018.
My Cage:
Midwest habitat (8 square feet), two "pigloos", mostly fleece bedding, paper bedding for kitchen/main potty area
My Cage Specs:
Pet Store Purchased Cage, no longer used as main cage, Meet or exceed recommended sizes (see www.CavyCages.com)