Skinny adf, bloated betta?

You could try and take the frog out to feed it or put a cup over it so the betta can't get it's food be careful though, they need to go to the surface to breath every once in awhile. you can try to feed the betta 1/4 of a pea, it helps with constipation. You could also stop feeding it for a day or 2 to give it time to digest. Good luck!