Can you see any obstructions in its throat? may be as simple as gettin an eye dropper or syringe and flushing some water down its throat or you may need to check for gape worm which as far as I understand you can see if you look down its throat. Ive never had experience with gape worm before so hopefully some one else can chime in and point you in the right direction as far as that goes. But sometimes my babies get food stuck in their throat and I just simply squirt water down the throat and they're fine. Good luck!!