YOU SAID:
The kitten is very alive and happy.
INTO JAPANESE
子猫は非常に生き生きと幸せです。
BACK INTO ENGLISH
Kitten is very lively and happy.
INTO JAPANESE
子猫はとても活気があり幸せです。
BACK INTO ENGLISH
Kitten is very lively and happy.
That didn't even make that much sense in English.