A meemoo likes change like a cat takes to water...which is to say not at all (ignore the depiction below, it is completely irrelevant)

A meemoo in a wall is quite a testy contender. Getting one out has never before been achieved. They will pull things in, but will not be pulled out themselves. Perhaps they fear being eaten by something bigger...do they fear the cycle of life? It is truly one of the great mysteries which science cannot begin to touch.