excessive skin in older lab

Question
My 12 year old female lab has excessive skin hanging from under her neck that seems to have appeared recently . . making her look like she has a really thick long neck.  She doesn't appear to be in any pain and the area feels fleshy, she eats fine - just an ole' girl who moves slowly.  Any ideas - just old age?
Thanks

Answer
Old dogs get that way.  My 12 year old is that way.  This photo is straight on:
http://www.photolocker.net/images/Labman/knitanewaster.jpg  It shows even more from the side.  It could be worse if the dog is overweight.  That can cause many other problems.  Here is a good guide to judging her body condition:
http://www.puppychow.com/products/popup_body_condition.aspx  If so, you may want to switch to a senior formula.  I still have my Aster on adult pro Plan, the same as my 8 month old.