We had this exact thing and the smell was soo strong, we actually changed formula from kendamil to cow and gate and give the odd gaviscon as can be refluxy and made a huge difference and hardly is sick as all and when he does it doesn’t smell x
My little one is sick quite a bit after feeds, usually straight after but sometimes can be hours after, she gets expressed breastmilk through bottles though. We tried her on baby gaviscon but that made her constipated and then tried her on Carobel but she started to reject the bottles and the milk actually tastes disgusting lol so no wonder she wouldn’t take the bottle! We’ve decided just to let her be with the sickness as it doesn’t seem to cause her any issues ☹️
I had the same with my LB, they did a trail on pepti one (milk allergy formula) but he’s still a bit sicky on it not as much as he was prior but some babies are just sicky babies xx