
Hi chalkley,
There's a huge number of differing reasons which could produce the test results you describe - I know it's easier said than done, but the best thing to do now is wait for your vet's appraisal ;)
Unfortunately shepherds are well known in the veterinary profession for a multitude of ailments which cause weight loss etc but on the plus side of that is the fact that there has been much research done in that area.
Good luck and please keep us posted when you've heard further.
Best wishes, Teri :)