Amazon has already pretty much destroyed the brick-and-mortar bookstore, and now that it has moved into other retail niches, everybody else has to watch their back. But Global Pet Food Outlet seems equal to the challenge, with prices that consistently beat Amazon — not to mention PetSmart and its ilk. The store also boasts tremendous variety, some of it falling into the “extreme eating” category. How would your dog like a 3-pound bag of wild kangaroo meat (with apples)? Also for sale: venison, bison and peanut butter fro-yo (for dogs). Just about every kind of cat food is here as well, including “weight control” and “hair-ball control” varieties. And where else can you find food specially formulated for your chinchilla or pet rat? 4449 Sepulveda Blvd., Culver City. (310) 391-3330, globalpetfoodoutlet.com.