I have been trying to add fresh meat to their diets at least once a week. I usually give them fish (whatever is on sale at target- frozen individual filets) and just bought a few pounds of beef that I am giving to them in small portions. I will occasionally buy them bison marrow bones from the feed store. They LOVE all of it.
I am a long time vegetarian, and really know nothing about meat. I had thought about pork, but you guys pointed out that it's fatty. I used to give them chicken, but that causes nothing but problems for Heidi.
What else can I easily/ inexpensively find at a grocery store that would be good for them? Extra points if it can be frozen and given in small portions- like I don't know what I would do with a whole turkey or anything like that.