I think Merc is still traumatized by his escape and also still adjusting to his new surroundings. Check the care sheets to make sure your husbandry is good on your temps, humidity and hidding spots. 9 days is awhile to not have eaten but definately not on the scarey side. Many people only feed their frogs once a week as a regular occurance but since he is new to your home I wouldn't just ignore it either. You said he is still active which is a good sign. I would keep him in a very quite and completely dark room. Don't fuss with him and I wouldn't be trying to hand feed a frog newly introduced. He's probably pretty frightened at this point. Depending on the size cage you have I would put a small cricket bowl in a location that is very near to him when he is up and about. Somewhere he can obivously see it. Again keep it real dark and don't sit there with a flashlight watching him. Check back in a couple of hours and see hows he doing. The more time he has to get use to his new environment the more comfortable he will be eating. At some point you should also have him checked out for parasites with a vet. Good luck and keep us posted.