Help with Buffalohead Cichlids

[DoubleD]

I bought some buffalohead cichlids about a week ago from one of the local shops here in town. I have a pair in a 29g with 3 Upside-down catfish. They all seem to get along fine, but the cichlids and cats spend all their time in the rock caves and never really come out. Even when I feed them they sit and wait for food to float by the caves. I am not sure what to do, I am worried they are not eating enough and would like to see them be more active. My idea was to add some tetras maybe Lamp-eye tetras or Lemon tetras. Any other ideas?
Thanks!

[Crispy]

I would give them more time to settle into their new homes.

[hari-goshi]

The upside down cats(Synodontis nigriventris) might be more comfortable if you add a couple more. They seem to be much more active in groups of 5+.
The buffalo heads may never bring a high level of activity to the tank but they will make up for it with interesting personalities.