I have a female ckc chihuahua Ive had since she was born. She is up to date on shots and on heartguard and flea control. She does ok with other dogs after she gets used to them but sometimes takes her a while to warm up. She has never been around cats and Im not sure how she would act. She lives with kids and does great. I have mis placed her ckc papers. They are like $15 to get. But if want them I can contact ckc and get them. But you have pay to get them.