An animal rescue group says more than 60 cats need immediate medical attention after they were rescued from a Toronto apartment in "deplorable condition."

Toronto Cat Rescue says the Ragdoll and Himalayan cats were removed from a one-bedroom apartment by Toronto Animal Services and brought to the shelter last week.

Rescue staff said the cats suffered through a "terrible hoarding case" and were found after their breeder was hospitalized and could no longer care for them.

Many of the cats need dental surgery, cold and eye infection treatments and shaving for their painfully matted hair.

Most cats are still being assessed by animal services officers, but those in the worst condition have been taken to veterinary clinics.

Toronto Cat Rescue is calling for donations, saying the treatment for each cat will cost an average of $150. The charity is also looking for foster homes for some of the cats.