Unexpectedly interrupted

Our little Jasper is going deaf in his old age, bless him. The other day, on our return from a quick trip out, he didn’t hear our car pull up in the driveway. Nor did he hear the key in the lock,.. or the front door opening! I think he’s going to have to hang up his guard dog hat soon. 
 We went through to the living room, where he had his back to the door and he was very busily sorting out the sofa after pesky humans had been sitting on it and it needed re-doggifying. As soon as I spoke to him, the poor little love jumped out of his skin and spun round with a guilty expression on his face! 
 In case you’re confused by the accompanying illustration, okay it may be just ever so slightly an exaggeration of what we saw when we walked in…