Never found any.

Try what I do:

• Buy beef liver from someone kind and good.
• Freeze it till its semi-solid (the point here is that it's easier to cut this way)
• Dice the liver into little 0.25" or so squares.
• Freeze a bag of these little guys.
• Every morning or other day or whenever you just take them down with some water like taking a multivitamin.

It'll take you about 30 minutes of work on that first day and for that you can net yourself like one month's worth of superpowerfood. Raw, to boot!

My brother told me that he learned at some training seminar or something that all dog food in the U.S. is legally required to be fit for human consumption. I was skeptical and decided to look it up, seems accurate. I must admit that I have considered ordering some grass-fed bison liver treats to try but never followed through. Here is what I was able to find out:

"The FDA’s regulation of pet food is similar to that for other animal foods. The Federal Food, Drug, and Cosmetic Act (FFDCA) requires that all animal foods, like human foods, be safe to eat, produced under sanitary conditions, contain no harmful substances, and be truthfully labeled. In addition, canned pet foods must be processed... to ensure the pet food is free of viable microorganisms."

Source

"U.S. laws require that pet foods be processed, so that they are safe for human consumption. Part of the logic behind this is that, when people lose jobs, the sale of pet food increases. Obviously, unemployed individuals on limited incomes are not buying pets. Hence, it is safe for humans to consume pet foods."

Source: Kenneth N. Hall, Ph.D., professor emeritus, Department of Nutritional Sciences, University of Connecticut.

Source

It is still a little off-putting for sure but if you try it let me know how it works out!

Cook it first mate! Worms.