Sorry to hear Trev. I've put an irrigation sprinkler along the top of the chook pen and a mini sprinkler hose across the rabbit cage. Chucked on an overtly expensive timer so it goes on for 5 minutes an hour for these stinking hot days in the hope it will help the poor buggers.

The chooks and local birds love it (the cockatoos and lorikeets sit on top
Of the chook pen and bathe) but the rabbits hate it until the water stops and then they love digging themselves a miniburrow in the cool dirt.

Except for the timer it was only about $20 all up to install and took about 2 hours mostly because I kept having my feet pecked by the chooks and it stupidly tickled while trying to drill holes in for the brackets. Timer was nearly $100 iirc.