Self Introduction 4:Pets

I have 2 dogs. One is Ruiji and Another is Charo. Ruiji is a male and he will be 8 years old next November. Charo is a female and I don't know how old she is because she was an abandoned dog. Ruiji doesn't get on with Charo. Everytime he sees Charo, he gets angry and barks. So, Charo hates Ruiji. On the other hand, Charo loves cats. When she finds a cat, she runs in the garden and whisks her tail.