Thanks weesilvie - I have emailed my vet and asked about acupuncture so will see what she says. A quick google search shows that there are several other practices and a couple of independent vets around here who do it so hopefully it won't be too hard to sort out.
I know of several people who have used it with bunnies with good effect, and from what I read with cats, although it is needed quite intensively to start off with, you can decrease the regularity once things have started to settle and improve...and in some instances only an occasional 'top up' is needed.
Milly has recently started on the RC ageing 12+ which sounds pretty similar to the Hills j/d - I will see how she goes on that (she absolutely LOVES it) but will also bear the j/d in mind. She also has a heated cat bed which is on a timer to heat up for 15 mins every hour, which she loves and is sat snoozing in as I type
I find that if it's plugged in all the time, she gets out after a while as she seems to get too warm, but having it on 1/4 of the time seems to be about right at the moment. I don't know if it helps or not, it certainly won't do any harm and she does love it!
I'll keep you posted when I hear back from my vet and if I decide to give it a go.