Trying to use what I have got as a bonding pen rather than buying a new pen, I have an old outdoor pen that is 4ft x 3ft which I am using as a temp place for new bun at the moment, I was thinking if I halved it to 2ftx3ft and neutralized it in vinegar would that size be too small to start the bonding then I could after a week let them in to all of it if it goes ok before they eventually go in to the kitchen. Thanks.