Freezing Waterers Experiment

SlaterFarm

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Sunday, January 25th, 2026

We let our eight Cream Legbar hens out of the coop and into the run every morning, and then for a while each evening they are let out on the property free-ranging. I’m retired, and I spend a lot of time outside with them, I love my girls, and they are quite friendly. As you all know, they’ll march back into the run as daylight fades. Then, for their own protection, after they roost in the coop we close them up in the coop again until morning. They always have food and water in the coop, and in the covered run.

Inside the coop we use two of those small-mouth Mason jars for waterers, screwed into the little plastic tray. I have them lifted on a pedestal to keep litter and poop out, and it has been working very well. The girls seem happy and we haven’t bought any eggs since they started laying.

Now, we’re going through their first winter. As I write this the ladies are almost one-year old and we just started experiencing some minor freezing. Here, we don’t have what I would call real bad winters, and in the eight years we’ve been here we only had one winter where it went down to about ten. The lows are usually in the mid 20’s, and not too often.

We’ve been wanting to come up with a good way to keep the waterers inside the coop at night from freezing. I recently “Googled” a question on the internet and received this AI Generated quote as an answer: “A common trick to prevent a dog's water bowl from freezing in cold weather is to place a plastic bottle filled with salt water inside the bowl; the salt lowers the freezing point of the water in the bottle, helping to keep the surrounding water from fully freezing.” For the past two nights the temps here were reported to be in the high-20’s, and we had light ice on both coop waterers.

Tonight I am testing a Mason jar waterer out on the deck with a salt-water filled plastic bottle in the jar. [see pic 1] The lid on the small bottle is screwed on really tight, and despite the way the glass distorted the photo, the water flow is not blocked.

2026-01-25 Salt Bottle Test cropped 2280x2632.jpg


The local weather report says we’ll get a low of 24F tonight, and then warming into the high 30’s at night over the next few days. Of course the weather reports are always accurate, and I am looking forward to seeing the test results in the morning.

Monday, January 26th, 2026

This morning at 07:30 the thermometer on our back deck claims 29-degrees, and the Mason jar waterer is frozen in the tray and inside the glass jar. [see pic 2] When I shook the assembly a little bit there was no movement of water, indicating that the water was quite frozen in the tray and in the jar.

2026-01-26 Salt Bottle Test cropped 2352x3016.jpg


My conclusion is that the AI Generated answer to my search is completely fabricated, or maybe it came from a source that never actually tried their own suggestion. I’m wondering why it was mentioned as a “common trick,” when it obviously does not work. Maybe it only works in dog bowls.
 
Because AI sometimes lies when it doesn't have a good answer.

I'd be afraid of using glass in freezing weather. Any temps below 32 will cause freezing.

Before we started using heated water bowls I would give them warm water once, or twice a day, and the next morning smash out the ice and fill them back up. Many keepers remove the waterer at dusk and return them in the morning.
 
Yeah, I think that trick has been promoted on the internet for quite a while. Salt water does have a lower freeze point but the salt needs to be dissolved in the water in order to disrupt the bonds that are needed for freezing to occur. Sugar does the same thing, disrupting the hydrogen bonds. Thus the sugar water in a hummingbird feeder will withstand sub freezing temps to some extent.
 
Because AI sometimes lies when it doesn't have a good answer.

I'd be afraid of using glass in freezing weather. Any temps below 32 will cause freezing.

Before we started using heated water bowls I would give them warm water once, or twice a day, and the next morning smash out the ice and fill them back up. Many keepers remove the waterer at dusk and return them in the morning.
Thanks for this reply. I do know about the failings of AI, but my feelings may not have been too apparent "between the lines" in my post. My post was only an information text to point out the salt part of my "experiment." I know that 32F freezes water, and we DO remove the waterers in the Run at night, and the freezes here are not very bad, not enough to break the glass inside the Coop. Our hens are well taken care of. I'm just always trying to do better. Thanks again.
 
Thanks for this reply. I do know about the failings of AI, but my feelings may not have been too apparent "between the lines" in my post. My post was only an information text to point out the salt part of my "experiment." I know that 32F freezes water, and we DO remove the waterers in the Run at night, and the freezes here are not very bad, not enough to break the glass inside the Coop. Our hens are well taken care of. I'm just always trying to do better. Thanks again.
Sorry if my post came off wrong. I'm known to just run through information in my head sometimes. :oops:
 
I agree, AI is not a reliable source for information given that sometimes it generates flat out false information.

saltwater has a much lower freezing point than fresh water. Placing a sealed bottle of salt water in regular water wouldn't change the freezing point of the unadulterated water though. If anything I would expect it to speed up the freezing of the water outside the bottle because the salt water can get colder than the plain water.

I imagine this trick might work better with an open bowl, but more because placing the bottle in the bowl gives a dog something to paw at than because of the saltwater.
 
Sunday, January 25th, 2026

We let our eight Cream Legbar hens out of the coop and into the run every morning, and then for a while each evening they are let out on the property free-ranging. I’m retired, and I spend a lot of time outside with them, I love my girls, and they are quite friendly. As you all know, they’ll march back into the run as daylight fades. Then, for their own protection, after they roost in the coop we close them up in the coop again until morning. They always have food and water in the coop, and in the covered run.

Inside the coop we use two of those small-mouth Mason jars for waterers, screwed into the little plastic tray. I have them lifted on a pedestal to keep litter and poop out, and it has been working very well. The girls seem happy and we haven’t bought any eggs since they started laying.

Now, we’re going through their first winter. As I write this the ladies are almost one-year old and we just started experiencing some minor freezing. Here, we don’t have what I would call real bad winters, and in the eight years we’ve been here we only had one winter where it went down to about ten. The lows are usually in the mid 20’s, and not too often.

We’ve been wanting to come up with a good way to keep the waterers inside the coop at night from freezing. I recently “Googled” a question on the internet and received this AI Generated quote as an answer: “A common trick to prevent a dog's water bowl from freezing in cold weather is to place a plastic bottle filled with salt water inside the bowl; the salt lowers the freezing point of the water in the bottle, helping to keep the surrounding water from fully freezing.” For the past two nights the temps here were reported to be in the high-20’s, and we had light ice on both coop waterers.

Tonight I am testing a Mason jar waterer out on the deck with a salt-water filled plastic bottle in the jar. [see pic 1] The lid on the small bottle is screwed on really tight, and despite the way the glass distorted the photo, the water flow is not blocked.

View attachment 4289085

The local weather report says we’ll get a low of 24F tonight, and then warming into the high 30’s at night over the next few days. Of course the weather reports are always accurate, and I am looking forward to seeing the test results in the morning.

Monday, January 26th, 2026

This morning at 07:30 the thermometer on our back deck claims 29-degrees, and the Mason jar waterer is frozen in the tray and inside the glass jar. [see pic 2] When I shook the assembly a little bit there was no movement of water, indicating that the water was quite frozen in the tray and in the jar.

View attachment 4289086

My conclusion is that the AI Generated answer to my search is completely fabricated, or maybe it came from a source that never actually tried their own suggestion. I’m wondering why it was mentioned as a “common trick,” when it obviously does not work. Maybe it only works in dog bowls.
Since like me, you're retired and also you're present at the end of the day for coop lockup, have you considered just taking the waterers into the kitchen at night? Either let them thaw out/ warm up overnight, or take the opportunity to wash them or swap them out for clean jars.

I also read recommendations to not keep water in the coop due to needing to minimize humidity, especially in the cold for frostbite prevention. I have a Nestera coop, and about all that will fit inside are the actual chickens, lol, and have a wall-mounted waterer out in the run. But I'm taking it in at night as well.

Chickens are eating and drinking at night, so other than the nuisance of toting things back and forth, it's a pretty handy solution. And low-tech!
 
Hahahaha, yeah, AI is really helpful for SOME things. I have heard a solar powered water agitator (meant to keep mosquitoes from breeding in bird baths) helps during daylight hours but I just use an electric de-icer myself.

Oh, and I have a nipple bucket waterer in the coop. It doesn't change the humidity if you already have plenty of ventilation.
 
I'm guessing you're near the coop, and go out every night to close them up and morning to let them out?

Easiest thing is to just remove the waters when you close them up (bring into the house), and put them back in the morning.

I would recommend getting a safer option for waters, though. Newly hatched chicks typically don't knock the glass over, but older chicks (and adults) can.
 

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