How warm do I need to keep my flock....... Help or advice please..

i felt sorry for mine so turned the heat lamp on when we hit the single digits.. we are farenheit though.. we are also buried in about 4' of snow.. when it is 30f i think 0? for you we have no heat on. they are fine with that.

 

I am in Wichita, KS, USA and we are also having a mighty cold winter this year (worse than I can remember for several years). Our temps are actually colder than yours, as for days now we have not had temps even approaching 0 celcius! Our high for the last few days has been below freezing and at nights it drops 10-15 Fahrenheit from the daytime high so....I know why you are worried. I don't have bantams and have no experience with them either so hopefully someone else can chime in and advise you about them specifically. However from my experience with full-sized birds, so far they have not had any problems with the cold. This is one time where a smaller coop is really an advantage. I only have 7 birds, but I have an A-frame coop with a footprint of 4x4 that is also 4' tall. In other words, there is about 32 cubic feet of air. The body heat of 7 birds in 32 cubic feet of air is able to keep the temperature above freezing (water does not freeze overnight). I have not added supplemental heat EXCEPT that I made a cookie tin heater. It currently has only a 13w bulb in it and helps the birds keep the temperature up enough for the water to not freeze.

On the hot water bottles, my fear would be that they would cool so quickly that they wouldn't be of much use. I love my own hot water bottle but even filling it with boiling water and keeping it against my body covered in a blanket, its not good for more than a couple of hours, so hanging in cold air, I doubt if it would put off enough heat to be worth the effort.

 

I cant tell you what to do but I can tell you what I have done!
We have had snow since before Christmas. Our temps will be getting down into negative numbers later this week!
I put a thermometer in the coop at roost level so I can tell just how cold it is where they sleep!
I put 2 by 4's sideways for roosting on so they can lay their feet flat and sit on them with their feathers protecting from frostbite.
I am currently using vaseline twice a day on their combs and wattles to prevent frostbite.
My Husband has secured a heat lamp with a red warming light bulb to keep them a little warmer!
Just make sure it is secure and at least two feet from all combustible material!
Be safe and happy chicken keeping from across the pond!

 

I have three heat lamps about 2-3 feet of the ground in my coop right now because its sooooo cold. the younger ones and my peacock have been sleeping under them and the older ones roost way up high in the coop and theyre fine! Good luck! Theres alot of great threads on this topic right now on BYC as we are all experiencing bitter cold in the northern US right now.

 

its cold where i am........ ct.......i have been leaving my 250 watt red heat lamp on all the time!
its my first winter with my hens,, i want them comfortable. when i come home from work (in the morning about 11am) i let them out into their covered run,, the heat lamp just stays on for them, they can come and go as they please... but i want them to have some fresh outside time!
good luck.

 

How young are your birds? 0C doesn't sound that cold to many folks on here, but if your little chickens aren't use to it, it can be hard. I would think the smaller breeds would be less cold hardy? As far as worrying about not giving them a little heat because they'll have problems adjusting to the cold outside...I haven't seen it with my girls. I open the doors every day to let them out (this is their first winter too, and they're @ 16 weeks) if they choose to go. They generally go out for short periods at a time, will go back in the coop to warm up, and then outside for a little more exercise/pecking about. I keep it above freezing in my coop with heat lamps. I use a small W bulb on some nights, but have broken out the 250W for the past two nights when we dropped into the single digits F.
If you have a heat lamp and you're worried about them, try a small wattage heat bulb above a certain area of their roost or something. That way if they want the heat, they can move to that area, but you're not trying to "heat" the coop. Don't rely on a clamp, secure your lamp with wire at least 18" away from bedding, etc. Good luck to you and your little chickens!

 

Your Pekins are what we call Cochins on this side.

To get a perspective

0 C = 32 F

-10 C = 14F

Chickens have a down coat. They handle cold better than heat. I don't have Pekins/Cochins but yours are thickly feathered. My chickens play outside in the very low teens F as long as they are not in the wind and do not get frostbite. If it is windy, they stay inside out of the wind or get in the protected corner in the run.

Your danger is not that they will freeze to death but that they might get frostbite, primarily when they are roosting. They can get frostbite anytime the temperature gets below freezing, but mine don't when the temperature gets into the single digits F here. Whether they are in danger of frostbite depends on several things, but mainly draft and humidity. If they are roosting in a draft, you need to fix that. End of story!!!

Humidity is a bit more complicated. Chickens and their poop gives off humidity. If you have adequate ventilation, this humidity is taken away and you don't have the problems. How do you have ventilation without drafts, you ask. Good question. Have the openings for ventilation higher than they are roosting. Don't have anything open below their roost while they are roosting.

Teach1rusl has a great point. As long as yours are feathered out you should not have a problem, but if they are still very young, they could have.

I'll give you two links to documents Pat wrote. She is the resident expert on this forum concerning cold weather and ventilation. In my opinion, you can depend on her for this topic.

Pat’s Winter Coop Temperatures
https://www.backyardchickens.com/web/viewblog.php?id=1642-winter-coop-temperatures

Pat’s Ventilation
https://www.backyardchickens.com/web/viewblog.php?id=1642-VENTILATION

I'll also point out that electricity sometimes fails. I firmly believe in having coops that do not require outside heating sources to allow the chickens to do well if at all possible. In truly cold climates that may not be possible, but in climates like yours and mine, it should be.