They are drinking out of a 32ounce rabbit/ferret bottle. They learn pretty quick, but you have to not give them a regular waterer, because they will take to that and not learn how to use the nipple.
Teaching them involves tapping at the tip for a few minutes a couple dozen times, and the brave one will figure it out and all the rest will learn. It's not that bad.
However, I do watch them VERY carefully because some might not pick up on it. The silkies are now in a separate brooder because they can't peck hard enough to get the water to come out of the big bottle. They'll have to be raised with the regular waterer or the 8 ounce single ball waterer.
I find the window of learning how to use it is within the first few days... and then again after they are a few months old. It just doesn't seem to click if I try to change from a regular water to a nipple water if I wait too long.
I use the water bottle from day 1 till about 4-5 weeks old. Reason being, is by that time, they will drink all 32 ounces in about 5 hours or less and I don't care if water is spilled out in the run from the rubber tub like bowels. By 4-5 weeks, they are old enough to go outside and drink and go inside to stay warm. I'll be kicking them to the out door brooder in about a week, and kicking them to the grow out pen/brooder in 4 or so weeks... maybe sooner since these are all meat birds except the silkies. I think you can always use the watering style if you had a big enough bottle and enough nipples for the number of birds.
As for how to get those shots... lots of time, patients, and clicking.
Edit: The water bottle holder is made out of K'nex pieces. I really really wanted the roller coaster set when it came out, so I got it for Christmas and by far has been the best toy EVER! You can make anything out of it. Every kid needs something like that to build out of.
