He does run during playtime, but he's been a little quieter the past few days. Still running but not in his usual crazy way. Also, he usually runs on his wheel no matter how much he runs during playtime. Tonight and last night, when I gave him his breakfast he went to sleep! He loves food and usually chows down as soon as I give it to him. Although this morning he had eaten his usual amount. Do they get less active and less crazy about their food as they grow up?