ThreeSheds: I think the pub you saw will have been the "Hark to Mopsey" in Normanton, just NE of Wakefield. The sign shows a picture of a hunt in progress, so I would imagine that Mopsey was a particularly famous hound.

We have a "First in, last out" here in Whitby, that is its official name rather than a nickname.

I rather liked the pub in Tarrington [Herefordshire] which was called the "Glass Pig". Last time I passed I noticed it had reverted to its earlier name of the Tarrington Arms, more traditional I suppose, but somehow less fun.