Cats and the Qualia of Happiness

My cat, having satisfied himself with the food available indoors, ambles back to the door and sits expectantly. He'll look up at the portal, look around, look at me occasionally. If I draw close, he'll rise up and paw the side of the door, possibly rub himself against me, make movements that seem to express a readiness to go forth. He meows on occasion, if the exit remains barred for too long.

As near as I can tell, he experiences a desire to go outside.

Would he feel pleasure from his desire being fulfilled, or would he simply feel relief from the pressing urge?