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					Originally Posted by Britster  I was wondering this myself    
But I guess it's better to be safe than sorry! | 
 
  Being safe rather then sorry is exactly why I asked the question. I have only walked with Tinkerbell in my surrounding neighborhood which is blacktop or level grass. The hiking we will be doing will be in the mountains on much rougher ground then she has ever walked on. 
I tend to agree that she will be fine, but as we plan on taking some all day hikes I want to be ready if she gets too tired to keep walking. She is a little on the small side at 3.8 lbs. and a 5-6 mile hike may a bit much since she isn't used to the mountain terrain. 
This site is great for getting good advice of all types. Thank you everyone.