hi there.
read your posts and felt compelled to write. you must be so frustrated! is there another vet in your area you can take your puppy to? i wouldn't be too impressed with a vet who had done all this testing, charged tons of money and arrived at no answers - and then to make you feel like you are worrying needlessly on top of it!!! something is obviously being missed, and i don't blame you for being upset. please consider a second opinion. perhaps this is not something your current vet is familiar with. ask for copies of the tests that were done and any xrays they have to take with you. i hope you find out what is wrong.
good luck!
tracy
