all of my info is coming form Bird talk magazine and things i have read on canarys,I read they do best as an only canery because they will pick on each other but if you want to get another canary get 2 more so the head canary has not just on other housemate to bother.But I would just keep your bird as an only bird your bird might not want a canary friend he could have never lived with other canarys.I read don't bath them more then 2x a week because of there feathers will dull,mixed seed,eggfood,and veggies is what it says to feed them in BT,but i think some pellets wouldn't hurt.
Do you know how old your bird is?Is your bird male or female?