
I have a grass pollen allergy sufferer (a wire fox terrier), and I did talk to my vet about desensitising injections, which I was told would run over many months. Starting off with daily injections, moving to weekly, then monthly. Expensive, but the insurance would have paid - I cannot remember the exact cost but it was hundreds of pounds. I have a feeling something like £800 was mentioned, but I have a bad memory for things like that! The vet explained that the success rate for these injections (they are made up by the allergy testing lab for your dog's specific allergies) is not high, but of course, they do work well for some dogs. In the end, after much discussion we decided not to go ahead, but to treat with regular baths (using Malaseb) when she got itchy enough to break her skin scratching, and with Piriton. Very occasionally, when she has had a very bad attack of itchiness (eg. in late summer when the grass pollen is very high) she has needed a steriod injection - twice so far. And last summer we managed to get through without one.
We have tried homeopathy, as our vet is also a homeopathic vet, (and does accupuncture too). But we didn't seem to have much success with this. I felt it did work when the itching wasn't severe, but in the high pollen season it didn't seem to work at all. Still, it wasn't expensive to try.
I use Piriton quite often - actually she had half a tablet yesterday evening because she is itchy at the moment (and has a runny nose and watery eyes too). I will give her a bath with Malaseb shampoo this weekend, as I see she has scratched her face and made it sore round the mouth.
It is a constant battle to keep the itching at bay. It isn't even the itching that is the real problem but the fact they tear their skin, it gets infected, they itch more.... an awful cycle. I have been in despair about it, when she has been covered in sores, but we have been lucky over the last year. We are surrounded by fields, mostly grazing for sheep and horses, so there is no chance of avoiding the pollen, we just have to deal with it.
A dust mite allergy will of course be hard to deal with as it is in the home. But if your friend trawls the internet she will find lots of information on dealing with it, because lots of people have such an allergy. Vacuum cleaners with filters. Freezing bedding before it is washed, or washing at very high temperatures.
I would certainly try the allergy injections if our current measures to keep the itching under control fail. I do hope your friend has success with treating this awful problem.
Claire