Catfish may take to feeding faster than my HBG did which took a couple weeks. So, don't be surprised if it takes them a while to show up. I would suggest adding some sinking feed to the mix. I think it would aid in getting them to come to the dinner bell a bit sooner, but not required.
Either way, establishing a feed routine will help you access the situation and be good for the fish. I can't think of a another way to check. Even with a good routine, don't expect all of them to show up for feed at the same time.
Do not overfeed. A good rule of thumb is to only feed as much as they will eat in 15 minutes and they probably won't show up the first few days, so, just throw a handful a day to get things started.
Welcome from Mid Western MO!
