i am a new lab owner and i have a couple of training questions. i can get her to retrieve and basic commands, but how do i get her to look up..silly question, but when i throw my dummie she waits till it hits the ground to retrieve. she is 3.5 months old. are there any definitive books that are a must to read when training a lab for hunting? also, i have seen alot of posts and ads for them in cabelas, and all sorts of places...what are e-collars, and could I benefit from using one?