My stepmoms very healthy 2 year old stray kitty that has been with her for months went to vet for a checkup as he had worms. Vet administered Profender liquid on his neck. Later that evening he became lethargic, wouldn’t eat and has now been in vet hospital getting blood transfusions for severe anemia ! This cat has survived outdoors as a stray for almost 2 years until he came to my stepmom ! This Profender is killing him and there is nothing vet can do but keep him in supportive care ! Bayer the manufacturer denies thus making pets sick !! Really !! My poor elderly stepmom may lose her precious fur baby due to this awful medication !!