Drinkers

they are ok for chicks (afterall they are called chick drinkers) and for one broody hen with them but not suitable to use for large fowl all the time. They would be empty very quickly or knocked/blown over. 

I use them only for chicks, they're to small for a hen to drink in comfort.

For the big girls i use car boot bought casserole dishes that have lost their lids, you can pick them up for pence.  My hands are not as strong as they use to be so i have a struggle with  'proper' drinkers getting the tops off.

 I  go round everyday with an old washing up brush, scrub them out with the water thats left and refill  from the watering can .

if you have chicks though make sure they can't drown in whatever drinker you use 

Thanks for all the ideas folks - plenty to choose from, tho I do like the guttering!
Didn't dawn on me that the mushroom might be a bit small for a chook's head - lots to learn. BG