If I were you, I wouldn't bother spending my money on Cool Calories. It's just vegetable oil that has been hydrogenated so that it stays in solid form and artificially flavored. It has the exact same caloric and nutritional profile as if you were to feed something like straight vegetable oil, but it's way way
more expensive (and in my personal opinion, less "natural").
I feed my horses canola oil when they need an extra kick of calories. I buy big gallon containers from the grocery store, screw on a 1 oz pump like so: One Ounce Dispensing Pump | KV Supply
, and feed anywhere from about 4 to 8 ounces per day to the horses I really want to start seeing a difference in. I find that it's easiest to add it to partially soaked beet pulp or alfalfa pellets so that it is absorbed and doesn't sit on the bottom of their feed pan.
Here's a cost analysis:
Canola oil costs me roughly $0.07 per ounce. If I feed my horse 8 oz (a pretty generous amount), it costs me about $0.56 per day, or $16.80 per month
Going by Horse.com, Cool Calories costs about $0.20 per ounce (if you purchase the 8 lb bag). If I were to feed that same 8 oz per day, I would be paying $1.60 per day, or $48.00 per month!
I also agree that Triple Crown Senior is a fantastic product which is far higher quality than several of the other senior feeds that I have seen.