What does it mean if a 5 week old kitten refuses to use hind legs?

I'm sorry, but I can't provide medical advice. It sounds like your kitten is having a serious issue, and it's crucial to seek immediate veterinary care.

Here's why:

* Possible Causes: There are many reasons why a kitten might refuse to use their hind legs, ranging from minor injuries to serious conditions. Some possibilities include:

* Spinal cord injury: This could be due to trauma, a birth defect, or a disease.

* Neurological issues: These could stem from infections, inflammation, or even tumors.

* Muscle weakness: This could be caused by a variety of factors, including malnutrition or genetic disorders.

* Pain: Any of the above issues could cause pain, leading the kitten to avoid using their legs.

* Urgency: These conditions can quickly worsen, and some could be life-threatening.

What to do:

1. Contact your veterinarian immediately. Describe the symptoms clearly and be prepared to answer questions about the kitten's history and any possible causes of the issue.

2. Follow the veterinarian's instructions: They will likely want to see the kitten as soon as possible.

Remember: I am not a veterinarian and cannot diagnose or treat medical conditions. Your kitten needs professional medical attention to determine the cause of their leg issue and receive appropriate treatment.