They seem to be. Definitely very active and alert. I actually had a high mortality rate with my first diamondbacks when I didn’t feed them as much. I noticed that Rick’s were growing much faster than mine so I started feeding them more. I havn’t had any trouble since. If they start to get overweight or bloated, I’ll usually cut back for a day or two. But that’s pretty rare. Most of the time I think they look too skinny.