Are you mixing it in with the raw food? It doesn't require very much, so 5 pounds of meat would only need two of those gels. I premix the Alnutrin and fish oil into the 5 pound batch and then freeze it in individual portions. 5 pounds of meat is a lot so I would be surprised if they're tasting that small amount. Are you sure it's not something else?I brought the Amazing Omega Wild Alaskan Salmon Oil 2000mg gels, but one of my cats don't like It. So I gotta figure a way to give it.
Also I ordered some raw from my pet carnivore website and been told it contains the liver. Should I be adding more liver?
I'm not super familiar with mypetcarnivore. Are you feeding their whole prey options? From their FAQ:
"It has been our experience that by feeding a whole prey diet and a variety of proteins over time, your dog, cat or ferret will get all of the nutrients that a healthy pet needs."
I wasn't able to find a grind on there that was just meat/bone/organ or meat/organ, but to be honest there's a lot on there and I didn't look for very long. Can you link which product you got from them?