So I have a pair of chinese x embdens. She went broody 31 days ago and has been an amazing sitter. Starting sitting on 13 and we are now down to 8, the others being infurtile. Candled all the eggs earlier and only movement in two which have pierced through internal sack. No movement in the others at all and seem to have different size air sacks. Any advice? Should I bring jn the two that have internally pipped. Why taking so long when goose not a large breed? Thanks