I wrote a thread last week about my dog that had been diagnosed with arthritis and had started collapsing and was walking in a very strange way. I am sorry I don't know how to link it.
I took your advice and arranged an emergency appointment and saw another vet who was brilliant. She immediately arranged X rays and the result is my dog has ruptured cruciate ligaments in both back legs. Poor little thing she must have been in a lot of pain.
She is off to a specialist vet in High Wycombe next week to have a bilateral repair.
At least we know what the problem is now and hopefully it will be resolved.
Thanks again to those who replied. It made us get on with things.