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Hi, there! It sounds like you have a very healthy, normal granddaughter, except perhaps a bit colicky. The drooling is unfortunately just a normal baby thing--they will drool pretty constantly while they teeth, which seems to be always until all of their teeth come in. The fussing--this is hard to gauge without a little extra information. When you say that she fusses a fair amount unless you walk her around, that makes me think colic. I have a four year-old who struggled with colic for around 5 and a half months, so I feel like I could almost write a book on that...I hate for any parent or grandparent (or baby!) to go through it. Could I share a link of some symptoms with you and see if it seems to resemble your granddaughter?
Here you are...take a look at the signs and see if this is similar: http://www.webmd.com/parenting/baby/colic-symptoms