I'd like to be able to give Ellie kibble when I'm gone all day but I just gave up on that. The minute I start giving it to her, I'm sure I'll find something wrong with it.
Never tried LA, so no help there but I don't really think it is a great or bad food.
Canidae is now made at Diamond. I personally would try and stay away.
There are some reports of Wellness causing stool issues on YT lately but for those it does work for, they seem to really like it.
If it has been a week or two on the NB and they aren't doing well, I'd definately switch.
Maybe find a food without all the things that you don't want like rosemary and just add fish oil and vitamin e for their coats? Finding one without all of those ingredients AND that gives them nice coats is probably going to be very difficult.