> Here in Australia, "free range" hens must be kept at no more that 10,000 head/hectare

Australian "free range" eggs are a scam. When people imagine "free range", they're thinking of chickens walking free in a green meadow, which is nowhere near what actual "free range" chickens get to experience. 10,000 head/hectare is disgusting.

To get what you imagine you're getting with "free range", you need to buy pastured chickens and eggs: https://www.youtube.com/watch?v=can8xFpZKRs