study these characteristics more thoroughly
Squeaky wheels -- do they actually get the grease?
Cart Boys -- must look into their traits. Much like old West Gauchos?
Pecuilar coloured markings on 'handle' and side areas of most species
Super One Foods
Toys 'R' Us
Occurances of 'plastic' Shopping Carts. Possible new subspecies or simple environmental adaptation
Any relation of Shopping Carts to paper vs plastic argument? PVP? PVC? P2P? WTF?