It's very important to take your ferret to a veterinarian immediately. Dark green stools and lethargy can be signs of serious health issues in ferrets, including:
* Gastrointestinal problems: This could be caused by infections, parasites, or food changes.
* Pancreatitis: This is a serious inflammation of the pancreas that can be life-threatening.
* Hepatic lipidosis (fatty liver disease): This is a common condition in ferrets that can lead to liver failure.
* Other diseases: There could be other underlying medical conditions affecting your ferret's health.
Do not try to self-diagnose or treat your ferret. Only a veterinarian can properly assess your ferret's condition and provide the necessary treatment.
Here are some tips while you wait to see the vet:
* Keep your ferret warm and comfortable.
* Offer fresh water, but do not force feed.
* Observe your ferret closely for any changes in behavior.
Prompt veterinary attention is crucial for your ferret's health and well-being.