Weasley may not be able to see anymore, and he is having some other difficulties getting around, but he surely does perk up those ears at the sound of produce bags being unpacked after a trip to the grocery store.
We added some extra runners, to act as a runway for him, as he makes his wobbly way around the house. At first he continued to try to hug the walls as he moved, but he's got the idea now, and follows the paths pretty well. And he can find the food dish with no problems at all! Bunnies are amazing, aren't they?