Glad to hear Al is feeling better this morning! I agree, he probably just over did it yesterday. I took my first greyhound to the evet because she was limping on a holiday, and I didn't have GT to talk me down Just a soft tissue injury!
Wanted to add, I agree that add-ins can get out of hand. I add stuff occasionally just because I think plain kibble is boring, but that's more for me than them The girls get raw one meal, and kibble the other, and seem to like both equally.
You actually don't even have to cook the eggs, although they do like scrambled a raw egg mixed with kibble is fine too. I mix in a can of sardines or canned salmon about once a week. Molly will stand on her back legs and hop when she smells that (Costco has a 10 pack of canned salmon, tuna size cans, for about $10)
The only thing to be careful about would be the bones. He can chew on them, but beef bones are "recreational" bones, meaning he shouldn't try to actually eat them, they are too hard. Otherwise, anything and everything!