Thankfully, we have never had a problem with mice or rats. Sorry that you do!
We have had a few mice that make their nests around the coop, but thankfully never in the coop.
But our cats and snakes take care of them! :lol:
Haha :thumbsup Your girls will love it! Just fill it with treats & let them have a go at it!
They can eat them raw, but I wouldn't suggest feeding them a raw egg every time one is laid. You can scramble or fry them up for your girls :D
But I...
I buy actual "chicken toys" for my girls :) See the "Lixit Chicken Toy" They love it! I also buy a Purina Flock Block for them to enjoy on days when they have to stay cooped up :)
And don't feel guilty for eating their eggs, if your chickens got the chance to eat their very own eggs, they would...