Four young rabbits were found dumped in a shopping bag in the Toxteth area.
A member of the public called the RSPCA after finding the underweight rabbits in the L8 area at around 4pm on June 21. They are now being cared for at an animal centre run by the charity in Upper Colwyn Bay, North Wales.
The rabbits are thought to be around three-months-old, and weighed just 490g when they were picked up - in just a week that has almost doubled to 1kg. The RSPCA said it had seen a 49% increase in rabbits coming into its care during the first five months of this year - and the charity is building more accommodation at centres to help keep up with demand.
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Animal rescue officer John Littlewood said: "Sadly we are seeing more and more animals being given up as people’s circumstances change. Help is out there, abandoning or dumping an animal is never the answer - please speak to friends and family, your vet or a charity first.
"If anyone recognises these rabbits they can get in touch with the RSPCA on our appeal line 0300 123 4999."
RSPCA rabbit welfare expert Dr Jane Tyson added: "It's more important than ever that we spread the message to people to do their research before taking on a pet. Rabbits can live for a long time and can be costly, they need much more than just a hutch at the end of the garden - they need space, companionship and enrichment to live happy and healthy lives.
"If you do feel able to commit to a pet or feel you could take a rabbit in for fostering please contact your local RSPCA centre to help."
To help the RSPCA continue rescuing, rehabilitating and rehoming animals in desperate need of care please visit the charity's website or call the donation line on 0300 123 8181.
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