Does this chicken have worms?

[Lorcanfeely]

Recently one of my hens has developed a little white trail near her vent and has started laying eggs with weird coloration.

 

[Wyorp Rock]

Recently one of my hens has developed a little white trail near her vent and has started laying eggs with weird coloration.

What does her poop look like?

She has urates on her feathers. It's look like some of the pigment on the egg is being rubbed off before it dries.

If possible, take a sample of her poop to your vet and have a fecal float to see if she needs deworming.
If that's not possible, then deworm her and see if it makes a difference.

To treat most worms that poultry can have except for Tapeworm you can use Safeguard (Fenbendazole) or Valbazen (Albendazole). Both are given orally by weight; they do not mix well with water.

Safeguard dose is 0.23ml per pound of weight given orally once a day for 5 days in a row.
---OR---
Valbazen dose is 0.08ml per pound of weight given orally once, then repeated in 10 days

Here's how to give oral medications:
https://www.backyardchickens.com/ar...dications-to-all-poultry-and-waterfowl.73335/