Poop and formula question please need advise

Hannah🇬🇧

So Iv recently Changed my 17 week olds formula and she seems. More happy on it. Not as colicky and not spitting up as much. But when she goes for a poo it’s sounds so horrific and like she is doing really loud wet farts 😂 but when I go to do her nappy it’s no where near as bad as It sounds. It’s now thicker than before as it used to be so runny. Is it normal for it to be so noisy when she goes for a poop?