Starve him for a a few days see if that works. Also try soaking the pellets so they soften a bit, a lot of bettas arent used to having a dry, hard pellet so they spit it out a few times to soften them
If that still doesnt work, try steamed eggs. I had a really fussy girl who wouldnt even eat live food... I tried steamed eggs and she loved it, was the only thing she would eat
http://greatbettafishcare.blogspot.com.au/2009/09/food-for-betta-fish-5steam-egg.html
If that still doesnt work, try steamed eggs. I had a really fussy girl who wouldnt even eat live food... I tried steamed eggs and she loved it, was the only thing she would eat
http://greatbettafishcare.blogspot.com.au/2009/09/food-for-betta-fish-5steam-egg.html