Of course, we can't know for sure what may be going on, but we can offer some information that may assist you in figuring it out!
First of all, it's important to understand what it is that causes egg yolks to stay centered in the first place. The chalazae are the parts of the egg that are sort of like springs, and they act to hold the yolk in place. The chalazae are the think whitish parts you will have seen on either side of the yolk. Sometimes people will choose to remove this part of the egg when cooking, since it is thicker than the rest of the egg, and if you are making a custard or pudding it can sometimes make a difference. But as an egg gets older, the chalaza (singluar - chalaza; plural - chalazae) can unwind a bit, and this can cause the yolk to settle to one side or another.
So if you are using older eggs--for instance, if you saved some up to use during slow winter laying---it's possible you're just seeing the natural changes that occur to eggs as they age.
The other thing that helps keep the yolk centered is the thickness of the egg white, or albumen. Younger hens have eggs with thicker whites in general. The thick albumen is thicker... and even the thin albumen is thicker than it is with older hens. So as a hen ages, there may be some changes in her egg quality that could cause a yolk to settle to one side.
What that means is that when you use older eggs from older hens, the yolks will probably settle fairly easily.
In addition, hens sometimes lay eggs with watery whites in very hot weather due to the change in the way they breathe (to cool themselves down). That will not be an issue for you if it is not hot outside. But it's true, too, that some respiratory illnesses such as infectious bronchitis can cause a hen to lay eggs with watery whites (thus causing a yolk to settle). If you think that is the issue, you will want to contact a vet or an extension agent to get a diagnosis. We are not vets and can't diagnose your birds. However, if respiratory illness were an issue, you would probably see nasal discharge and see coughing or sneezing.
Aside from the concern of illness, having yolks that settle really isn't a problem for the most part. There are two main occasions where a yolk settling to the side might be a problem. One is when making deviled eggs! It's a pain in the neck to have the white too thin on one side, as it's so easy to tear the white when peeling or just have it collapse. The second is when incubating, since it can cause some problems for the developing chicks. Generally, try to use only your freshest eggs for incubation.
|||egg problems, old eggs, new eggs, fresh eggs, yolks, yolk problems, yolk settling|False 146|How do I know which chickens feeds have hormones and which are hormone-free?|There are no hormones in any brand of commercial chicken feed in the United States, according to the US Cooperative Extension Service. We think that "hormones" rumor makes the rounds every so often because there are some poultry feeds that specifically label their feed as "hormone free" while others don't bother. The Extension Service explains that it's basically illegal to use hormones in poultry feed in the US.
However, because some feeds specifically advertise themselves as "hormone free," that begs the question for the other brands that don't mention it: "Do you use hormones in your feed?"
They do NOT.
Some commercially available chick feeds will contain medication. When they do, it is usually a coccidiosis preventative, and will always be listed on the label. In fact, most brands have both medicated and unmedicated versions of chick feed, so you can make a choice--but no hormones.
Rest assured that the Extension Service confirms that there are no hormones in your commercially available poultry feed.