Betta too picky or pellets too big to bite?

He ate Betta Color Enhanced pallets, and was happy eating them. I got
another bottle of the same kind when I saw that I was running low on
betta's food. But to my surprise the pallets of the same kind are too
big, about 2x or 3x bigger in size than the original ones. There's no
explanation on the bottle or anything. Now I tried feeding it to my
betta but he would go for it and then spit it out before even taking
it all in. My first reaction was the food must be too big for him to
eat. I returned the food I got and exchanged it for a different brand
once I saw that the color-enhanced pallets were the same size as that
second bottle. So now I got a little bit smaller pallets but they are
still bigger than the ones the betta's used to. I fed him some today
as he hasn't eaten much in almost two days. But he did the same thing,
spit it out and only eat the smaller bites when he could find. That
sort of tells me that he's not just being too picky. What do you
think?

I think I'm gonna go by Petco tonight or tomorrow and see to get
smaller pallets for this little fella. I'm gonna try to crash the
pallets that I got today, and feed it to him that way.. Any ideas
would be appreciated!!!

Thanks,
Jass