Ds is nearly 11mo, had reflux as a baby. He feeds fine now, no problems, and isn't a big puker 
However, whenever he has a milk feed, I can literally hear the contents sloshing around in his tummy. Is this normal? It's never occurred to me to worry about it, but he's had a bout of food poisoning, and I am just worrying abour everything.
Could it be a digestive problem?