I change the water in Henry’s waterbowl everytime I feed him (i.e. three times a day), I change the bowl once a day.  Yet I’ve never seen Henry drink out of it.

He gets enough to drink, though. He drinks rainwater, he finds outside.  He drinks water standing in the sink if I don’t get to him first.  He drinks from puddles after I had a shower.  And just now I caught him drinking from my husband’s toothbrush mug which he (my husband, that is) inexplicably always leaves filled with water after brushing.