As you have already surmised, the biggest culprit is most likely the inconsistent temperatures. Do you ever rotate eggs to other parts of the incubator on a regular basis? Other than a design change, that is the most immediate fix but not perfect. More permanently, you could change the air...
Molting first usually happens in a chicken's second autumn and each thereafter. However that is when the chicks hatch in spring and summer. A December hatched chicken will often molt in the first autumn. When a bird molts, you will see a lot of feathers like someone had a pillow fight in the...
No hate here. It is common in waterfowl control to prevent eggs from hatching. That is by oiling the eggs. Coating the shell with oil prevents transpiration of oxygen and CO2.
Usually corn oil is used.
In case you were wondering, it is considered humane and approved by wildlife agencies.
Extremely unlikely. It has been done but not worth the effort. As has been said, there are many reasons egg layers don't have twins (from a single egg). They are only a possibility in live bearers where abdomens can expand and the embryo's nutrition can vary due to the demands on the mother.
Looks like it could be fowl pox/dry pox, A virus spread most likely by mosquitos. I would expect others to be infected. However, since there are no other symptoms like weight loss, lethargy, respiratory issues or diminished egg production - I would consider something else.
In the absence of...
I don't remember saying anything about symmetrical. I'm not even sure what you mean by symmetrical in this instance. The general idea is for any heat developed in the coop via solar energy or anthing else to cause air to rise and bringing fresh air into the lower front windows and ventilating...
I designed a building not based on the dimensions but rather on the ventilation, thermal dynamics and philosophy of the woods design. Just modified with the constraints of my materials, site and needs.
It was essentially the same, perhaps with a slightly smaller footprint, a little taller at the...
I agree with @Sally PB. Insulating a coop is counterproductive. Especially true in your climate. Your temperatures are in the sweet spot for most chickens. Money spent for insulation would be better spent to make the housing larger and windows bigger. Unless one plans on heating a coop...
How long has this been going on?
This is one of 4 or 5 poultry labs in Texas. I'll see if I can find the others. Or this one can tell you about others.
https://www.poultrydvm.com/labs/texas-am-vet-diagnostic-lab
Most labs will send you a Fed-Ex label for shipping the carcass. Tell Fed-Ex it is...
Egg binding I find unlikely. It could be one of several things. Any other symptoms? How long has she been lethargic? When did you notice the comb color change? I'm sorry to say it sounds like she isn't long for this world. Where are you located? I would start preparing to send her to your state...
I assume you have a rooster. Since you don't know when she started, don't give up. If they are her eggs, they all started the same time because she won't lay more after she starts sitting. Another possibility is that other hens will volunteer eggs after she starts every time she leaves the nest...
It isn't common but does happen with some frequency. If you hatch enough, you encounter all sorts of strange things. I once hatched a 3-legged chick. Accidents happen.