Plumjam.com has an interesting automatic
chicken waterer that caught my eye while I was enjoying their poultry
project pictures.
It's a huge improvement over
the regular gravity fed waterers, but still needs to be cleaned out,
and it cost more than an Avian Aqua Miser.
I'm not sure I would trust
the float not to get stuck, and would most likely be checking on it
often to see if it were flowing. I never have this concern with the
Avain Aqua Miser.
I would be willing to bet a
box of doughnuts that if the chickens were given a choice side by side
with this waterer and an Avian Aqua Miser they would forget all about
those two big scary holes to peek into and start geting all their hydration from
a source that will always provide clean drinkable water without nearly
as much fuss.
"I'm not sure I would trust the float not to get stuck"
I have one of those for my dogs (at least it has the same float mechanism from what I can see in your picture). It's one like this... http://base0.googlehosted.com/base_media?q=http://www.acehardwaresuperstore.com/images/347280.jpg&size=19&dhm=ff7ade72&hl=en I have never had a problem with the float getting stuck at all... in fact it works quite well. It does get dirty though since the local sparrows like to bathe in it and requires a good scrubbing every couple of weeks. So, as for the float working like it should... it is reliable. But, I am sure you'd have the same problem with dirty water.