SEASON PREMIERE: You know that recent TV ad showing animals of different species, and often natural enemies, cavorting or cuddling together? Well, National Geographic Wild already had turned that concept into a nature series long ago – and here it is, returning again for a new season (Number 4) of cats and dogs, horses and chickens, and just about any other mix-and-match arrangement you can imagine. It’s the animal kingdom version of The Odd Couple, only a lot more entertaining than