the cat is a vagrant cat ,i took it home, we became good friends.

(是 过去式 啦）. 但我不确定是 is 还是 was.

Stray lion

例：More than one million stray dogs and over500,000 stray cats live in the New York City metropolitan area.

在纽约市区生活着一百多万只流浪狗和五十多万只流浪猫。

wander更偏向于漫步，闲逛的意思