Sue, yes, thanks! His hunger this morning could be explained by his AM+4 which is 161. And that was taken 1h45 min after he ate 2oz of before grain - actually, he absolutely demanded food & I couldn't resist his huge pleading blue eyes!! I was surprised by that number, thought it would be higher. Not dismayed, just surprised. I realize the value of paying attention or manipulating one variable at a time, yet I can't get rid of my gut feeling that food plays a mysterious and big part in all his jumping jacks. Many thanks for your comments.
Sophie