a cat and a snake?! i wouldnt say that's the best idea, when the cat is looking at the snake through the tank .. the snake in my opinion SHOULD be scared. i mean the cats preditorial instinct isnt saying hi to the snake, but dont get me wrong there are some instances where 2 animals that youd think would kill eachother become the best of friends. be careful! trips to the vet are pricey!

As for your snake being head shy.. youve only had him/her a week!!! ofcourse they're going to be shy. i know it's hard not to leave them alone because they're soooo cute but it's for the best. the last thing you want is to stress out your new pet.