Two kittens in Bradford, United Kingdom, were coloured with blue and green permanent markers, leading volunteers at an animal charity to lambast the cruel act, calling it "dreadful".
Katie Jane, a volunteer with the Bradford Cat Watch Rescue (BCWR), said in a Facebook post on Monday (April 25) that West Yorkshire police handed over the 4 to 5-week old kittens to their care, and they have sought veterinary advice.
"While there is still a lot of ink on them, I have been very lucky to liaise with the veterinary poisons information service, who have offered me much advice to safely and systematically remove the ink," Katie wrote.
Katie added that the ink on the kittens' fur had a noxious smell, and BCWR volunteers had to be extremely cautious when bathing the felines, nicknamed Smurf and Shrek.
Despite several baths, the ink was still present on the kittens.
According to Katie, the police were investigating a separate animal welfare case involving a dog when they stumbled on the kittens.
No other cats were found in the vicinity.
"We also believe that children were not responsible for this shocking act of cruelty," added Katie.