Thanks :)
We are doing most of them (with the exception of getting rid of the dogs but they are not allowed upstairs or on furniture and carpeted areas, and they -dog beds included- also get a good washing every week!)
I don't vacuum every day, but when I do even the walls are vacuumed 
We didn't realise all that the work was having much effect until the holidays, during the first ones last year DS had the worst asthma attack he has ever had, Italy 3 weeks ago was a disaster with DS caughing all the night long, 2 weeks ago we decided to take with us the anti-mite mattress & duvet cover , and bed sheets for the weekend away, it made a huge difference! 