caretaker of a rescue pet; pet adopter
Used in animal rescue contexts for the person who takes in and cares for a rescued animal, often as a permanent adopter.
保護犬の迎え主を募集しています。
We are looking for adopters for the rescue dogs.
彼女は三匹の保護猫の迎え主になった。
She became the caretaker of three rescue cats.
Compound of 迎え (mukae, 'welcoming, receiving') and 主 (nushi, 'owner, master'). The term likely originated in animal rescue circles.