I don't get it!? Why do you feed your bettas so little? 3 - 4 pellets a day? They must be very thin.
I have been feeding (old enough: 1 - 2 months old) bettas exclusively on frozen bloodworms soaked in water. I feed them twice a day as much as they would eat. To condition weaker ones I feed them mosquito larva and daphnia excessively so they can eat when ever they want.
Bloated? Yes their bellies become very fat after feeding and they have thick bodies. But I wouldn't say they're bloated. The only problem I have is that some fully grown females are difficult to be embraced properly by males during spawning. But other than that, I have had no problems concerning feeding.
On the other hand if for some reason I fail to feed them for one day, many will become sick, weak, etc. some would even die. So again, I don't understand why you suggest at least one day without feeding.
I would change my feeding habits if I'm certain that it's better for my fish.
Out of topic ...... This is embarrassing; how do you up load pictures. I want to show you pictures of my fat fish. The "insert image" asks for a URL (what ever that is) without any other option so I can't go to my computer.