Just for additional interest - I noted down that Howard was seen petting a cat outside his house in one episode but it wasn't their own cat, just one that happened to be passing - according to the rather rough notes I made, this was in In Search of Childlike Joy and the Farthest Reaches of the Lotus Position.
Made a change from him and Clegg staring at beetles!
I remember seeing Howard petting a cat in an episode, too JB. Thought there was also an outdoor shot of their house with a cat someone in the background as well. With as often as Howard is zipping out the door their cat could not possibly just an indoor one.
Inky, I remember Entwhistle being involved in a conversation about someone with many wives. Possibly Tom was in on that conservation too. Can not think of the particulars at the moment.