How did the mahout come to know that Gajaraj was sad?
The mahout came to know that Gajaraj was sad because the elephant stopped eating his food. When the mahout served Gajaraj his favourite food, the elephant did not touch it.
The mahout noticed that the food remained untouched for two days. He checked Gajaraj's tummy and found nothing wrong physically.
The mahout then wondered if Gajaraj was missing his friend, the dog.
Explanation
As described on pages 5-6 of the chapter, the mahout observed that Gajaraj's food remained untouched. The mahout was surprised and concerned, checking Gajaraj for any physical illness. He eventually realized that Gajaraj's sadness was due to missing Buntee, not any physical ailment.
Solution Steps
Gajaraj stopped eating his food
The food remained untouched for two days
The mahout checked for physical illness but found nothing wrong
The mahout realized Gajaraj was missing his friend, the dog