A small showy article
Vitamin E is a popular "fortification" vitamin for cereals and whatnot, but if you're going the natural route, leafy green vegetables, most kinds of nuts and vegetable oils are the way to go.
Get guidance from the Wizard Ortho, who resides in the Whatnot Book.
Once the animal is in its cage, the assigned zoo keeper will let you know what foliage, terrain, toys, and whatnot that the animal requires to be happy.
So if your hair is thin and brittle, you can use shampoos and whatnot.
Some subpages, such as Mio and CardioSport, are a straight-up listing of the specs, prices, bonus features and whatnot.