The
 Cube run, which joins the side, has been extended over the years,  and 
then we added the chick cube, making an F shape.  Tilda currently uses 
the Chick's cube and run during the day, which is fine until we hatch 
chicks later in the year.
Over
 the years, the flooring level has gradually got lower and lower as the 
various Girls have rooked and scratched and dustbathed in it, and I have
 cleaned out and put in fresh Aubiose.   It has now reached breaking 
point - so low that I was reluctant to clean it out.
We
 discussed various options - including, of course, paving it.  We had 
tried rubber chippings in one of the Cube runs.  They were OK, but I 
think are better suited to an unroofed area.   We talked about getting 
some of that car parking hexagonal stuff, but in the end we tried 
something else.
So,
 today, everything came out of the run, and DH set to work levelling it,
 barrowing insoil from the rest of the garden, and then putting some 
mesh on the floor, compacting as he went.  A final layer of fresh soil, 
more compacting... and it looks fabulous.    I sprinkled some horse 
bedding over it,  but wasn't sure whether I was better off going gor a 
little or a lot.  I opted for a little, time will tell if that was the 
wrong choice.