Today I found a great way to give Al some exercise- I tossed a cherry tomato into the pond. He swam up and tried to grab it- and it bounced away. Again and again. WHen he finally got a grip on it, he swam about with it in his mouth for a few minutes, as though he didn't know what to do with it.
When he finally took a bite out of it, he didn't like the taste of it... but that didn't stop him from chasing the next one.
