They seem pretty happy. They hang out together and even feed with the other fish at feedings. And, they are always scurrying around with their searching and sifting
The most natural looking caves that I have come up with are homemade. I took a 2" pvc pipe(t-shaped) and used aquarium glue to glue on matching gravel that is in my tank. They blend in so well that my husband didn't notice where it was when I asked him if he liked the new cave.
I have a gold nugget pl*cos that I purchased about a week and a half ago. I am a little worried because he is extremely shy and is just now showing himself :( Yesterday was the first time I saw it eat. His belly is awful thin. I have been putting in algae wafers, etc. He's in with a betta who pays ...