What causes in a IGuana to have its back legs stop working?

There are several potential causes for an iguana's back legs to stop working, including metabolic bone disease, which results from a deficiency in calcium and vitamin D3. Other causes may include spinal injuries, infections, or neurological issues. Additionally, parasites or poor nutrition can weaken the muscles and nerves, leading to mobility problems. It's important for a veterinarian to assess the iguana to determine the underlying cause and appropriate treatment.