Hi there....just give it time ! Beardies can go through relocation stress [ like was mentiones by Sue ] and not eat for a few days or week. Your set up looks good ! I would take out the second log though, the one on the right in the pic. That way there is open space for you to drop the crix in a few at a time. Shake them up good in a jar so they are wobbly, [ a few at a time ] then drop them near him. But just let him settle in....if you try to force it, you'll stress him more. Wait for at least a few weeks before a fecal test if he continues to have runny poos. By the way, can you list the exact brand + type of bulbs you're using ?