Hi martin.
Well the fact that they are looking for food is a very good thing. I remember when i transfered my to their new tank, they were so scared that they all hid behind the bog wood for days. And still did not eat for some time. I remember when i bought a couple of discus from one of our club members it did not eat for a couple of weeks, till i thought it would die, and after that it still did not eat in front of me. FInally i gave it some beef heart and it started to feed in front of me. Only then i was sure that it was eating well. Now in fact it has just paired up with another discus and laid eggs on the bog wood at the front of the tank. Ofcourse these eggs are destined to be eaten at some point unfortunately, and for the moment i do not have space were to put them as a pair .
My discus still seem to be shy in the morning but in the afternoon when i come home from work and switch on the light the come to the front to be fed. It is good sometimes to leave them a bit hungry.