One of my collies spent a fair amount of time 'away with the fairies' towards the end. Some degree of CCD is fairly common in older dogs.
Before going down the CCD route, however, it is important to rule out other possibilities - the most common in older dogs being loss of hearing or sight, resulting in diminished awareness/responsiveness that one might interpret as CCD.
Also be aware that pain can cause diminished awareness/responsiveness, which might also look at first glance like CCD. A dog in pain - from arthritis, for instance - can appear somewhat shut-down, may apprear forgetful, etc.
Infections can cause confusion, resembling CCD as well. I saw this with a UTI in an older dog once. Once the infection cleared up, her mental fuzziness did as well.
So a thorough check up, including blood work, is often recommended as a starting point to investigating CCD.
That said, when my collie began exhibiting classic signs (getting stuck in corners, pressing his head against a wall, night pacing, etc.) we put him on Karsivan (active ingredient: Propentofyllin, similar to the UK drug Vivitonin.)
http://www.ncbi.nlm.nih.gov/pubmed/9931990 http://www.karsivan.de/
I saw improvement in the first six months on Karsivan - however, I would caution against expecting miracles. After about 8-9 months he reached a plateau, and then started to decline again. The rate of decline seemed a bit slower, though.
Several posters on a dog board I frequent have reported good results with Aktivat; I don't know if that is available here, nor do I have personal experience.
I don't know if Anipryl is available here, but you should have a discussion with your vet as to what options would be appropriate for your dog.
Some additional things I did to support my guy:
- First, sticking to a routine seemed to help.
- TTouch was a great calmer during the nighttime pacing incidents, as was an anxiety wrap.
- The presence of my other dogs was the single biggest help - my oldie oriented himself to the others, they seemed to reassure him - and my Hooligan in particular really did look out for her brother when he was lost in confusion. (She was already trained to assist my deaf dog.)
- I put babygates up at all the stairwells, as sometime he would forget where he was - I didn't want him to fall.
- When I had to leave the house, I put him in a safe room where he could not wander or hurt himself.
- I kept him on lead when walking - but I felt that daily walks were very important. He needed to be out and about, I felt the sights, sounds and smells kept him stimulated.
Also - I had him on Vitamin B shots for another unrelated condition, but noticed that his mental clarity improved markedly after the shots. My vet was a bit mystified by this, but nonetheless...
The 'away with the fairies' incidents came and went, especially early on. He'd be fine for days on end, then have a bout of confusion, then fine again for quite a stretch. I found it helpful to keep a diary, so that I had a non-emotional record of his progress (decline, really).
Bottom line, my guy remained happy until the end, even if in his own little world. I understand that some dogs can become quite distressed, but I didn't see this at all. It is important to keep your dog's quality of life foremost in your thoughts (hence my diary), and keep your veterinarian appraised of your thoughts and concerns.
And, it's important to be patient with your old friend, and keep your sense of humor.
Sending lots of understanding cyber hugs your way.
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ETA:
Curious about Anipryl, I did a little googling around. Anipryl is the veterinary tradename for selegiline hydrochloride - while Anipryl is not listed on the UniZH Vetpharm database, Selegilin is. The names it might go under are L-Deprenyl; Levodeprenyl; Eldepryl; Jumexal; Antiparkin; Jutaqilin; MAOtil; Movergan; Selemerck; Selepark; Selgimed; Xilopar. (I have no idea if any, or all of these are licensed for veterinary use - nor is it entirely clear to me if the drug is licensed at all in Switzerland.)
http://www.vetpharm.uzh.ch/wir/00001461/1519__F.htm
You might refer your vet to this site if he/she is unfamiliar with the drug.
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FYI for all pet owners, the Vetpharm site is a fantastic resource when you wish to learn more about the drugs your pet is taking.