My broody Buff Orp had 10 eggs in her clutch, setting since May 4. Two hatched on Wed May 25. Yesterday (26th) I took a look at remaining eggs and saw one that looked squashed as though sat on by something heavy. Late this afternoon I quickly float-tested most of the remaining eggs and most looked viable. (Did them individually in warm water, quickly dried them and back under the hen.) Checked on hen this evening, no additional chicks but there was another squashed-looking egg with some shell pecked off and the chick dead inside. What's going on? Last year this same hen hatched 5 eggs then pecked a late-hatching chick to death while it was hatching. Does it sound like she's "murdering" these eggs? Should I bring the remaining eggs that passed the float test inside, put them under a warm lamp at 100 degrees, try to hatch them then sneak the chicks under her that night? If yes, do I need to do something about humidity for the eggs to hatch right? Or should I give up on these eggs, go buy a couple of 2-day-old chicks, and try to sneak chicks under the hen hoping she'll adopt them? Any advice appreciated!