While Augusto's idea sounds fine on the surface, I don't know how well it would fly with public at the food market: Giraffe - $5.99/lb Sloth - $2.95/lb Condor eggs - $3.99/dozen and so on. Also don't know how practical it would be to keep a rain-forrest rhino as a pet, for example. Or a gharial in the backyard swimming pool ...