How to tell if a llama is underweight?

To determine if a llama is underweight, assess its body condition score (BCS) using a scale from 1 to 9, where 1 indicates emaciation and 9 indicates obesity. Llamas should have a visible fat cover over their ribs, a rounded belly, and a well-defined neck and back. Check for prominent ribs, a sunken appearance around the hips, and a lack of muscle tone, which can indicate that the llama is underweight. Regular monitoring and maintaining a balanced diet are crucial for their health.