There were a large number of birds in an aviary. They were well protected over there. Unluckily, an infectious disease broke out in the aviary. As a result, most of the birds fell ill.
The keeper felt worried and went looking for a doctor. The time, he was enquiring for a doctor, a cat overheard his talk from which she came to know that the birds in the aviary were unwell.
So, the wicked cat started making plans to reach the aviary someway or the other as she knew that, once inside, she could easily kill many birds and eat them up. Thinking hard, she decided to enter the aviary as a doctor.
So, she disguised herself as a doctor, took up a chest of medicines and approached the aviary door. The wicked cat asked the birds, "How are you? I have come here to cure you. Here are the medicines for your treatment."
Wisely, the birds replied, "We are quite all right and need no nursing. So, kindly leave us alone."
This way, the birds saved themselves from becoming the food of the wild beast.