I would ask your vet for a referral to a neurologist, unfortunately a very high percentage of Cavaliers suffer from either cm/sm and psom. To obtain a definate diagnosis for any of these an mri would have to be carried out. It sounds as though Charlie might be suffering possible cm/sm pain !
My little Molly has sm, her symptoms were not typical, she didn't scratch at all but became lame. When Molly was diagnosed, she was only 18 months and I was told she would not make 2, Moolly is now 6 and lives a contented life.
I have explained a little about cm/sm below.
SM is not a death sentence and can normally be controlled by medication and they can lead more or less normal lives and live to a good age. The first thing to do is work with your vet and get the pain under control. The second thing to do is to ask your vet to refer you to a neurologist. The neurologist may be able to diagnose SM (or not) without the need for an mri scan, although a scan will provide clearer evidence and information. The cost of a full mri scan can range from £1,200 to £1,800, if you do not have insurance, some neurologists will provide a mini scan for approximately £250.00.
Another way of discovering the presence or otherwise SM is for the neurologist to prescribe a drug for neuropathic pain, such as Gabapentin. Gabapentin costs in the region of £25.00 for approximately one months supply. This is not an ordinary pain killer, it works only on nerve pain, so it makes a rapid difference.
I have attached a couple of links for more information. www.veterinary-neurologist.co.uk and www.cavalierhealth.org and www.cavaliermatters.org
What kind of specialist is Charlie seeing tonight?
Tania and The Three Cavaliers!
Dotty!- A Sweet Little Tri
Molly - Pretty Tri Dougall - Gorgeous Blenheim