i'm having the strangest thing happen with my neednose fish. i haven't fed it anything in a few days (2 or 3) and now i put a feeder fish in. he seems to track it but never goes to eat it. it's getting to the point the feeder can allmost go right up the mouth of the needle and nothing happens. can someone shed some insite on this. the needle look nice and healthy so i'm really lost. it's not like he's full because he hasn't eating in a few days.