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 ...