No mammals should be kept in aquariums, the glass traps the heat and its too warm for them, it can make them sick. Pine shavings are good, never use cedar. I dont know how many people know that, but cedars seriously can cause brain malfunctioning in rodents. It happened with my guinea pig, so all the vets i have spoken with reccomend regular pine that isn't too dusty, its not good for their respiration. The treats I give my baby girl are mostly carrots, which she just loves, and dried fruits. Nuts I'm told aren't too good for them, particularly peanuts, becaues they fatten up to obesity levels.
I got my prairie dog from a pet shop that takes very good care of their animals, but she wasnt held much because the owner didn't want her to become attached to the staff. So when I got her at three months, she was wild and petrified of people. I started out petting her in her cage and finding her special spot-- behind her ears and her belly. I took her out of her cage everyday even if she fought, just for a little while, to get her used to my hand and my scent. When she gets upset i put her back though. After awhile i could coax her out of her cage with treats, and now she comes when she is called. You just have to be very, very patient, and try not to get angry or frustrated.