I emptied him out completely and found a bag of sand in his bum, But I haven't got any fine glass sand like granules left so I put that back, then filled with the plastic pellets and a little fat pellets on the very top, mixed with more plastic pellets. he seems fine and will do untill I can get the fine glass I like. and his nice a floppy, I filled him to the very top with lots of shaking the contents about so it all settled in properly. he feels great just like a real baby, and his upper chest doesn't cave as much, I think it just needed the plastic pellets and being filled more.
So thank you ladies.
another question though, when I get the glass filler for his bum, you know the sort that goes into limbs, what is the best thing to put it into?

for you both.