omg what a cutey! where did he get an entire wing?!
my best advice would be to start clicker training asap, shaping games will do a world of good for any dog, but especially one that is probably really smart...as your gus is. keep his mind occupied learning and he won't be as busy trying to occupy it himself. there are plenty of links posted on here about shaping games but to get you started i would check out...
www.clickertraining.com/ 101 Things to Do with a Box | Karen Pryor Clickertraining
i would also recommend a book "the power of positive training" as a good starter to all the basic commands and some tricks you could teach gus....
let us know if you have specific questions about how to train a certain trick/cue or how to deal with a certain behavior....
browse throught the other members posts too, lots of times people have asked the same questions you might want an answer to....
have fun and welcome to the dogforum....