"Little Roquefort" determines to build his new house on the side of another and his nail banging alerts the watch-cat "Percy" who is going to put a stop to the construction work. Except, in typical cat and mouse style, the harder the cat tries the more bruises and bumps he collects along the way. I quite enjoyed the pace of this seven minute animation, and the drawing itself is nicely detailed if maybe not so vivid as some of it's contemporaries. Nothing new, even for 1950, but it's still quite amusing.