Sirius has been trying to do that, and he's caught bits and pieces of conversation. Information to follow up on or pocket away for some other use. However, when you're also presented with sausages your attention does shift somewhat.

He looks up, and it's hard to say exactly if he's curious at what Dodger's saying, or if he just wants that bacon. The human part of his brain is trying to kick itself into gear, to pay attention. But Bacon is really distracting.