That heifer’s diet sounds heavy on energy and supplements but light on what her body might actually be missing — effective rumen function and trace mineral balance. A few things jump out:
Umbarger + Depth Charge + Caboom is a lot of processed feed and additives. If she’s not utilizing it, her rumen microbes may be off. Sometimes too much starch (especially barley and payload) depresses fiber digestion.
VitaFerm tub access is good, but if she’s only on it part-time at night, she might not be taking in enough trace minerals (especially copper, selenium, and zinc).
Hay quality matters — if the hay’s stemmy or low protein, it limits gain no matter how good the concentrate looks.
Parasites or low-grade illness can mimic “feed not working.” A fecal check and body temp read can rule that out fast.
Age and frame — if she’s bred early or going through a growth slump, she may be diverting nutrients elsewhere.
Kalmbach’s 14% Stocker/Grower is pretty balanced for exactly that middle-ground animal: not finishing yet, but past the creep-feed stage. It carries the right mix of protein, vitamins, and trace minerals (especially chelated copper, zinc, selenium, and manganese) that help where the fancy show rations sometimes fall short.
You could pull back a bit on the Umbarger mix and give her a consistent base of the Kalmbach feed, maybe starting at 1% of her body weight per day, split morning and night. Let the hay stay free-choice, and make sure she’s got clean water and a plain white salt block so she keeps mineral intake balanced.
That steadier foundation lets you see if she starts to fill out before layering any more additives. If she gains on it, you’ll know it was likely a mineral or rumen-stability issue, not a calorie problem.