Maggie got it twice and at the same time each year, so although it's not supposed to be seasonal I asked my vet if there could be something that was seasonal that could weaken her immune system to the point the MMM would appear. The vet said that it was theory that had not been either proved or disproved so wouldn't totally rule it out.

As that time of year came round we did everything we could to boost her immune system - mainly switching her to the best food we could that suited her and also used the Grizzly Salmon oil which says can boost the immune system. Don't really know if those things are the reason or not, but we haven't had MMM back again so far!!