Background
Our dog is a Pitbull/Husky mix. We got him from the kennel where he spent about 7 years of his life (got adopted twice but returned to the kennel a few weeks after), he's been with us for 1,5 years. He doesn't like other dogs or animals (we're doing slow progress on that) but usually loves humans.
He is a very powerful dog with lots of energy. Education was hard at first (lots of exercise and discipline) but we got there with patience and he is much better balanced and calm. He has some rules that he understands and sometimes he tries to break them, we think he is only testing us, nothing special.
However, he gets very excited sometimes. He loves eating, we had to get a special bowl so he doesn't just vacuum the food. When we fill his bowl, he sits down because he knows we only give him the "eat" command when he calms down, but he still looks excited and runs like crazy towards the bowl when we tell him to and eats like a maniac.
After eating, he gets very excited. Currently, we're having some work done in the yard, so he is being held by a long leash (on his harness). He doesn't have room to run and just walks around in circles and barks at the sky.
The Question
How can we calm our dog after eating? Sometimes he is calm, sometimes he is excited, that's normal for him and we are glad he is this way. But he always gets pumped up after eating, and we would like to know how we can calm him down (or, if that is the right answer, should we let him release energy or something like that)?
Thanks for your help.
PS: He always eats after going for a walk, morning and afternoon/evening.