My Betta is having this same problem! He has been fine for years, no issues, no changes in tank, surroundings, then suddenly he had trouble aiming and getting his food, he would make many attempts and miss, when he did finally get it in his mouth he couldn't swallow it, it would just sit in his mouth. Poor thing is exhausted after eating and trying to swallow. So I would put my fingertip in the water and he would bump his mouth on my finger to help pop the food in, sometimes it would work and sometimes he would just tire of trying. Usually he could get it on his own but lately hes just stopped trying to eat altogether :( he just sits/lays all day, moves around every now and again. never plays anymore. now hes starting to get pale and one of his gills looks a little funny the past week or 2. This has been ongoing for over a month but just the past 2 days has he stopped trying to eat. Did you ever get an answers for your betta on this?