If they are consuming all you feed, I would not cut down on the 2 prime times, but add 3rd feeding at 11am at 1/2 time, and as it cools more, add another and change the last feeding to 630. They like to feed in warm water, but they all will eat more in the 75 to 80 range.
Fatten em up for the winter. It seems thru testing that 4 is optimal and more than that does little if any good.
