I've got a salmon favorelle who's been brooding for 24 days. She's sitting on 16 eggs and on day 21 one hatched. Then one more on day 23. Now it's been 36 hours with no piping or additional hatches. Is it really possible that only 2 out of 16 were good? The eggs are brown and I can't see anything with candeling. Also, the hen is neglecting her chicks in favor of sitting on the remaining eggs. What do I do?