I personally love them..
As long as they are big enough, have easy access, easy to clean, weatherproof, sturdy, fox proof, then i think you'll do well..

I'd certainly buy one for Lilly

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Mummy to:

Oscar and Molly Pooches
Oliver, Lily, Jacob, Sweep, Stevie, Blue, Dillon, Daisy and Flopsy Rabbits
Midnight, Alice, Bethany, Midget, Hermionie, Dora, Valentine, Casper, MJ and new babies!!! Meeces
Dean, Bella, Ruby Hammies