Where's the veggies?? Other than the pickle (which would only be loosely defined as a veggie) I don't see any. Even on induction, you are supposed to have a minimum of 3 cups of veggies daily. The reason that his pants are getting tighter could very well be bloating due to constipation. He doesn't appear to be eating too much, so the addition of some veggies for the fiber should help relieve the bloating and constipation.
His carbs look pretty low as well, but adding some veggies should help that as well.