A pair of four-month old kittens were found abandoned in the snow in Syresham, Northhamptonshire, earlier this week.
They were left in a cardboard box next to a bus stop with no bedding or food in freezing temperatures.
Good Samaritan Francine Wilkins was passing the bus stop when a friend discovered the abandoned pets and took them home.
She informed the RSPCA, which is appealing for information.
The cats, which were both wearing collars, were pronounced healthy but hungry by a vet.
Mrs Wilkins has decided to keep one of the kittens, which is a grey tabby, while a friend has offered a home to the other, which is ginger and white.
RSPCA inspector Claire Ryder said: "People who don't want their pets for whatever reason should make sure they find a new home for them. There are organisations like the RSPCA who will help.
"You must never abandon animals, especially in this sort of weather when they have little chance of surviving for long."
Meanwhile, a cat adoption day held by the Cats Protection branch in Southend has been hailed as resounding success after all the animals on show found new homes, the Echo reports.
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