bum calf

Noun

A young heifer or bull which has been orphaned or abandoned; it must therefore be adopted by another cow, steal milk, or be bottle-fed in order to survive, and is therefore often a runt.

Japanese Meaning

孤児になった、または捨てられた子牛（雌牛または雄牛）。生き延びるために他の牛に養育させられるか、ミルクを盗むか、哺乳瓶で与えられることが多く、そのために小柄な個体になることがある。

What is this buttons?

When the neighbors moved away, they left a lonely bum calf behind that the town vet had to rescue.

Google Translation / DeepL Translation

隣人が引っ越したとき、母親を失った若い雌牛または雄牛が置き去りにされており、町の獣医が救助しなければならなかった。

Details

Sense（1）

A young heifer or bull which has been orphaned or abandoned; it must therefore be adopted by another cow, steal milk, or be bottle-fed in order to survive, and is therefore often a runt.