Allotment and Vegetable Gardening

we've had our chickens for about 2 and a half months now and things are going good 
they are laying well and were getting loads of double yolkers! 

we have an arc, but they spend all day out in the garden from light until dark, they are obviously really happy, but im not 100% happy and am thinking towards the spring...

we've got young children who will be in and out of the garden constantly and wearing no shoes! every time the back door is open the chooks are there wanting to get in and obviously they poo everywhere in the garden which i pick up a few times a day, but in the spring/ summer this is goning to be tricky as the back door is always open and the kids are going to be treading in chook poo.

Im thinking of making a new run but space is a bit limited and i feel really guilty about them being in a run as they are used to constant free ranging  but i think its a needs must..

what can i make it out of and fill it with? id like to have a roof on and how much money is this likely to soct me? we only have 3 chickens.

any advice will be greatly received and thanks for reading my essay!

Buy some jellybean shoes for the children and make a trellis gate (bit like a fire guard) to keep the chickens out of the house.  Job done, only a few pence spent

I have chickens and ducks 21 of them! 2 children and a dog.  The children wear wellies to play outside!! Even in the summer, it's good fun.  Saves ruining good shoes too.   
Chickens or ducks are not allowed in the house!  That's where we walk round bare foot!
Having said that they are not too bothered when they have to go into their enclosure.  Better safe than sorry.