Fortunately, a woman witnessed the animals being dumped on the corner of Sutton Oak Corner, in Sutton Coldfield, on Tuesday morning and she tried to stop the man but he cycled off towards George Frederick Road.
She took the poorly pussies, aged six to seven weeks old, to nearby vets where two of three were found to be suffering from severe cat flu – one was barely moving.
The woman, who did not want to be named, said: “I was walking my dog and saw a male cyclist riding along carrying a green plastic box and he just threw it into some nearby bushes.
“I gave chase but he was too fast, then when I looked into the box I could see three little kittens.
“Sadly as he was far away I couldn’t give much of a description other than he was wearing a black hat, with a black top and jeans.
“I was fuming that someone could be so horrible to do such a thing and it was pretty obvious the kittens needed medical attention so I took them to a nearby veterinary practice.”
She contacted the RSPCA and animal collection officer Cara Gibbon took the kittens – a black male, a black and white male and a black female – to the Walsall branch of the RSPCA where they will be cared for there until they are healthy enough to be rehomed.
Cara said: “To just simply throw these kittens away is a callous and disgusting act. They are only about six weeks old and too young to fend for themselves.
“I am pretty sure if this lady had not found them they would have died so we are very grateful for her help.
“I would appeal for anyone with information as to who is responsible to call the RSPCA appeal line on 0300 123 8018.”