Mick certainly has aged, and Rosie the Alligator I think is a personal 'pet' of his, she is allowed free roam of his home. He does a comparison to show how snappy an aussie croc is compared to Rosie, and some kid usually gets his hat back with a few teeth marks in it from the croc.
Herpers should also know that if you are a member of a herp society you get in to the park for free. Ah, sweet memories of the trip I 'organised' for APS a few years back. Someone should do that again... behind the scene tour was awesome!!!