It's somewhat common for humans to have intramyocardial fat infiltration--I thought maybe (especially exercise-light) cows might suffer from this as well, perhaps to even a greater extent than humans--but, I don't know much about cows
I guess I was grasping at anything that would justify not feeding them beef
I've heard several say this, and fat sounded like the best logical reason yet.
Jordan--I think that earthworms and crickets are both relatively balanced staples. If I had to rank the two, I'd probably pick crickets over earthworms just because I have a better feeling about their overall nutritional balance--and they can be "gutloaded" to make them even better.
I'm sure pellets are fine, too; I personally haven't tried them yet. One (_very_ minor) downside to pellets is that they usually aren't controlled for thyroxine. For example, the Axolotl Colony reported a significantly higher rate of metamorphosis because of them. However, it's still not so common, and they also reported good results with growth rates and overall health with the pellets.
I also like live food because my axolotls have the good experience of chasing down food, and it's extremely inexpensive if you culture your own food--in both terms of time and money.