Calf Manna plus...

I was pretty happy for 10 months with Arrow on 3 lbs of Ultium twice a day. He's a hard keeper, for sure. He started refusing the stuff a couple months ago. I switched to 3 lbs Stragegy (the barn's standard feed) and 1 lb Ultium twice a day. Then he wouldn't even eat that (I'm CONVINCED they changed Ultium--threads started popping up on various forums about problems). Now he's on 4 lbs Strategy twice a day! Seems like a lot of feed...

I'm just starting out with Calf Manna. 1 cup seems to be close to a pound. Here's my question--should I add the cup to the 4 pounds of Strategy, or should I go back to 3 lbs of Stratgy (1 scoop) and a cup of Calf Manna twice a day? I haven't been able to find any Calf Manna calorie info. 4 lbs and cup sounds like way too much feed...thoughts?