The RSPCA is hunting for cruel yobs who crammed a litter of kittens and their mother into a plastic box and dumped them in Cawston Wood.
The female tabby cat was discovered cowering next to her two-week-old kittens by a member of the public on Wednesday April 20.
Shocking pictures released by the RSPCA show the kittens - three females and one male - sheltering under their mother inside a one foot plastic container.
The animals were taken into the RSPCA’s care and the charity is appealing for information to discover who abandoned them.
The mother has been named Willow while the kittens have been called Oliver, Cherry, Apple and Spruce, after the woodland where they were found.
RSPCA inspector Nicky Foster said: “We have absolutely no idea where this cat and her little kittens came from.
“It is very sad that a mum and her four vulnerable and defenceless kittens were left out in the open like this, where anything could have happened to them.
“Because they were found in a plastic box with food it is obvious that someone put them there on purpose.
“They are now being looked after in our care and are all doing well.
“It is important for us to find out why they were dumped like this, and we are urging anyone with any information to contact us in complete confidence on 0300 123 8018.”