मार्जालभक्षिते दुःखं यादृशं गृहकुक्कुटे ।
न तादृञ्ममताशून्ये कलविंकेऽथ मूषके ॥
mArjAla bhakShite duHkham yAdRuSham gRuha kukkuTe ।
na tAdRuk mamatAshUnye kalavinke atha mUShake ॥
When the cat eats the hen of the house, we feel very very sad. The same sadness is not there when it kills a sparrow or a mouse. This shows that the source of our sadness is attachment and not the real loss of life.