GuideTreat roundworms and lungworms
Target GroupCorvids
NOTE: In all my guides, I start from a situation where a rehabilitator takes his responsibility to take care of the animals in an ethically correct way. You should always try to minimize stress for the bird and since the birds, just like humans, are not the same, it can mean that you handle a problem in different ways by being creative! If I see different ways of doing the same thing, I try to write it down in my guides, but it is always up to the rehabilitator to take their own responsibility.
I do not have to write “I recommend killing” or “contact a veterinarian” or “according to law, you should …” because I start from the situation where you do the best for the bird and that you as a rehabilitator have learned to draw the line so that you do not end up in an unwanted or illegal situation. There may be an eternal battle between what you want and what is best for the bird.
There are also many factors where a similar situation can give different results. For example: access to a veterinarian, lack of time, lack of knowledge and previous experience can include cause large differences in the treatment and decision-making process and indirectly also the end result. Knowledge of basic things can make a huge difference in the stress level of the crow. For example. avoid anything that is black or checkered. They do not like it instinctively and it creates stress when they see that you are dealing with something that is black.
I put energy into my guides to make it easier for a rehabilitator to find information and to spread knowledge.
Do you see a way to improve my guides or do you see a mistake or do you want to add something, feel free to inform me!
If you are worried about doing something because it is new, ask other rehabilitators or a veterinarian for help.
The guides are continuously updated, so make sure to always download the latest version from

This guide describes what to do with birds that have gotten roundworms / lungworms


There is usually no problem with roundworms. So if the bird has no symptoms, you do not need to do anything.

Symptoms of crows having roundworms:

Dark, sticky stools that contain blood.
Sticky stools stuck in the feathers
Loss of appetite.

Medicine and Dosage:

tablets: The usual dose is 50 mg fenbendazole per kg body weight
liquid variant: 0.5 ml Axilur/Panacur 10% oral suspension is given per 1 kg bird

Fenbendazole (the active substance) is fairly safe to use (there is always a risk of side effects, as with all medicines).
Should Fenbendazole (Axilur) not work, you will need to take medication instead. the active substance Ivermectin.
Usually these are drops you have to put in the neck of the bird (not a noral suspension).

For an adult raven / crow (300 grams +):
For a jackdaw / crow / raven (50-300 grams):

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