My 13 yr old Pit Bull was diagnosed with bone cancer on May 23rd. The vet did not see much hope for her because of her age. I did some research on line and discovered rave reviews about K9 Immunity Plus. My girl is improving every day and getting stronger, not sicker. She is happy and appears to be pain free. Please try K9 Immunity. I will continue to give this to her every day. I've even started my 6 yr old healthy lab on it as a precaution.