It's something I've considered but decided against it as it means confining 10 ex-bats to close-quarters
(and they have already served their time in tiny cages).
Instead, I marked the day I bought a new bag of feed and the number of eggs each day. So far I have
a 20kg bag lasting 14 days and getting 107 eggs - a cost of approx 11p per egg. However, I also supplement
with own-grown greens, worms, etc, which costs nothing but time. Most days I get 8 or 9 eggs from 10 girls.
I get a drop to 5 when the weather is bad for two or more days in a row.
Rather than upsetting myself and my girls, I've decided to wait until egg production is around 55-50% before
deciding which ones to give away as pets by the process of segregation and counting eggs per hen.
I hope this helps.