I wouldn't eat my broccoli if there was an unlimited supply of french fries around!
LOL, I hate to admit it but my fish eat far better than I do.
But you make a good point, the fact that a food is more palatable, such as those which contain high inclusion rates of fat, or perhaps MSG, does not equate to them being better for the fish. If my wife would let me, I'd probably eat pizza 7 days a week!
If the pellet is too hard for the Oscar why didn't he eat it after if floated around a while and softened up?
Tom, while you are correct in that it doesn't matter how good a food is if a fish won't eat it, once initially rejected some fish simply won't go back to the same food & give it another go. Also, the NLS 10mm pellets take a good
8 hrs or more, before they begin to really soften up. I have fed the 10mm to several oscars, they all initially hit it like it was their last meal, but it was simply too hard for them to smash up in their mouth, and they gave up after a few minutes. I also fed it to a 6" female RD (just as a test) and she wouldn't let it go until it was finished. She took another & repeated the same performance. The 10mm was not designed with oscars in mind, (or juvie RD's for that matter) and results with that formula is going to mixed, depending on the species, it's size, it's feeding aggression level, etc.
I have made it crystal clear from the get go that th 10mm formula would not be a wise choice for oscars, even before I had tried the food myself, so none of this comes as a surprise to me. Some hobbyists are going to love the new 10mm pellets, and some aren't. From the feedback that I have been receiving from local hobbyists (some of them members here) I'm pretty happy with everyones initial results. (large stingrays, large pbass, large carnivorous plecos, large tigs & other catfish, etc.)