Aiyah, memang common lah after gastro, usus dia still sensitive, so berak cair tu boleh jadi normal recovery phase lagi, maybe another week or two. Tapi since dia baru recover from the vomiting and pneumonia (that's serious!), better check with the paediatrician once more to make sure there's no lingering infection, sebab sometimes the tummy needs a bit longer to settle, especially after handling feeding tube. A few of us noticed our kids' stools were loose for a while after gastro too, they'll normalise once the gut lining heals properly, tapi if it drags on or he looks lethargic/not gaining weight, doctor will know what to rule out.