Okay, my son started eating the Gerber Puffs when he was 6mths old, hes had 5 teeth then, but he has six now. But never…

Okay, my son started eating the Gerber Puffs when he was 6mths old, hes had 5 teeth then, but he has six now. But never had a problem with them before, nothing. Now i dont know what's going on with him, but he started choking on them. I dont get it. He was always fine with them, I just don't know if he just started inhaling them or what. They were his favorite snack, but now he can't have them. Anyone have any ideas??