Big Daddy's Gurl- it's just like the other livestock mentioned. It's expected in most places that if you're liable for a pregnant cow dying, you're responsible for the cost of the cow & the calf. Why aren't you only responsible for the cost of the cow, because then they could just replace it & impregnate & have a calf to 'replace' the lost calf? Why be responsible for the calf? That's the point people here are making. Where the OP is from, she's allowed to charge for loss of production (eggs), so it's acceptable where she lives. I can't remember what state was posted about by another poster, but the reimbursement cost for larger livestock was capped at $400/ea (I read that & tried thinking of any marketable livestock that would only cost $400 to replace!)- in places like that, she wouldn't be allowed to get more than $10/ea for her chickens, so it's not acceptable there.
With your thinking, that who's to say those chickens would have even laid those eggs, etc.- who's to say that cow would have birthed a living calf, or a calf that would make income vs. just up & dying in the snow or some such? Yet in some places, you're STILL responsible for that calf if you caused the death of the cow. And in some places, you can be held responsible for the loss of productions if you kill a chicken.