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Duck egg with blood on outside shell

post #1 of 5
Thread Starter 

Does anyone know what would cause a duck to lay an egg with blood on the outside shell? This is the second one we found. Our oldest duck is 2 years old. The amount is about the size of a penny         

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post #2 of 5

You will occasionally see blood on the outside of an egg - any minor irritation to the inside of the vent can result in a bloody shell exterior as it is an area of the body rich in vessels that is stretched significantly as the egg passes through.  I wouldn't worry too much until/unless it becomes an even more frequent thing - if you are concerned, and if your birds are manageable, you can always catch them up and give them a once over to rule out any obvious signs of trauma in the area.

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post #3 of 5

I did notice some blood on an egg - so I started inspecting vents, and found that Elfie - who does not like to swim - had some dried poo on the feathers around her vent, and I think that caused extra pulling when she laid the egg.  I trimmed it off - carefully!

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Please PM me, or use @Amiga in the message if you would like to hear from me soon.  

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post #4 of 5
Thread Starter 


Thank you for all the information. I am going to check them out. It has been very cold here around 2 at night was wondering if this also is able to affect them

post #5 of 5

I just read on another thread that was discussing this same issue with chickens that the cold weather can make them tense and that the vent needs heat to dilate. The extra tenseness of being cold can cause those blood vessels to be irritated as the egg passes through the vent. 

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