These cats were abandoned and dumped in a cardboard box outside an animal rescue charity.
As the last volunteers were leaving Animals In Need in Little Irchester between 6.30pm and 7pm on Saturday night, they spotted the box.
They opened it up to find three cats inside, but they have no details of where they came from or why they were dumped.
A spokesman for the charity based at Pine Tree Farm, which rescues and re-homes hundreds of animals each year, said: “As the last two volunteers were leaving for the night, they found a sealed cardboard box with holes punched through it, which always indicates there is an animal inside.
“On this occasion it was not one, but three adult cats.
“If no-one had found them then the box wouldn’t have been discovered until the morning and with it raining so heavily in the night, no doubt they would have got out and ended up who knows where.
“They are not in a bad condition, although the longer haired ones have some matting which we are grooming out.”
The spokesman said they have yet to fully assess the three cats, which they have called Dora, Jess and Felix, but said they are friendly and they will be looking after them until they are ready to be re-homed.
And they added: “We have no idea of ages, although they are young adults, and no background information.
“Once they have been vaccinated, neutered and microchipped, we will hopefully find them a new home where they can remain together.
“Until then we’ll make sure they get plenty of TLC.”
For more information about Animals In Need and its work, click here