Sorry to hear about that. It sucks when we get attached to these little guys that only have a 1 or 2 year life span. I still remember my first mouse that I had oh.... 10 years ago. His name was Leo and he was a black silky mouse with a tan belly. Such a sweet mouse and made lots of babies (wasn't really trying to but just missed that the other mouse I had was a female lol). Hopefully he goes peacefully.