My mother is 87 years old with early dementia. My father died several years ago, due to his death she was feeling lonely and sad so I got her two kitties (she and cats live with me). She adores her pets but she keeps feeding human food to the cats, against the vet advice since they suffer from food allergies and can only eat prescribed cat food. I have spent a lot of money trying to keep the cats healthy but she continues feeding them the wrong food. They are showing again signs of allergies, not to mention that are overweight. She gets very defensive and lies about her behavior. The situation is very frustrating as I'm the one taking care of the cats as well, keep them nice and clean, keeping litter box clean, pays for vet, toys, food etc. I wish if she just could helping me by stopping her behavior. I really don't know what to do. I will appreciate your inputs. Thank you.