i recently purchased this nem a week ago LFS told me it was a redfooted nem. just wanted some info on it. i noticed that it got comfortable right away and is opened up. when i try to feed it either it just wont take it or it closes all the way up. i tried putting shrimp and other things on a stick and pass it by him but he closes up. is this normal. what should i be feeding it and how. cant tell by pic but the color is an off white somewhat beige is this normal color cause they say white means stress but it isnt white.