If her neck is bothering her make sure to only use a harness for leash walks. You can leave her collar on to hold her tags but you don't want her pulling on it.
These sites go over spine and neck problems.
http://www.vmth.ucdavis.edu/vmth/clientinfo/info/neuro/discdis.html
http://www.gcvs.com/surgery/interver.htm
You may find surgery will help, or accupuncture it all depends on where the problem is and how bad it is.
If you haven't had her tested for tick carried diseases you might want to do that as those can cause muscle and joint pain in dogs.
Hope this helps you!
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