Guys,
Studies have proven that warmwater fish tend to prefer "optimal" temperature compared to "optimal" oxygen. They'd rather seek a better temperature with 'just enough' oxygen to be able to breathe.
Morning feedings are common, and healthy. Just because oxygen is lower in the mornings doesn't automatically cause fish not to feed. They really can't judge the difference between 3.5 ppm or 6.5 ppm. But their bodies can definitely instinctively adjust to temperatures. That's why bass hang out in the thermocline on hot summer days. Surface is too hot, and just because it has 6 ppm oxygen isn't motive. They'd rather hang out at 82 degrees in the thermocline than 91 at the surface, even though there's barely enough oxygen to stay alive.
Regarding feeding, stay with the premise of "hot" surface temperatures in the morning. When conditioned to fish food, they'll come eat and then head right back to where they are most comfortable.