yippy

My 13 yr old mixed cocker spaniel is not doing so well. I feel like he is not living his best life. He has developed several issues in the past couple years that impact his QoL. I'm worried how to deal with his buddy an 11-12 year old mixed shih tzu. I do not want him to get depressed nor do I want to get a new dog just to replace him. I'm open for suggestions. Thank you. I also told my older sister to not get me a new dog as she has a habit of doing so lol.