I supplement with fish oil because it is good for their joints, so Nova and Mandy have it for that reason. Also, if your meat is not grass fed and/or pastured and you do not frequently feed fish, then their diet is probably lacking in O3. I do frequently feed fish so I don't give much to them.

If their getting a good variety of meats, bones, and organs from a variety of animals and are healthy, then I don't see a reason to supplement. But because for right now my meat isn't grass fed, I am giving the fish oil. Luka gets 1000mg a day, Buck gets 1000mg every other day, Mandy gets 2000mg a day, and Nova gets 4000mg a day. In the coming months I'll be switching to mostly grass fed, pastured meats so the fish oil will stop except for maybe one or two a day for Nova and Mandy.