cats

We had to put down our 14yo cat last night he had some neurological shut down but he was my partners for like 9 years and she's devastated, I'm torn too but it's not the same I've only know him for a year. I haven't lost a pet in a long time does anybody have any advice? We had 4 cats now we have 3. I'm just trying to keep busy but my partner isn't handling it well which is understandable I just want to know what I can do to help? I know it's the grieving process I just don't know how to help. I'm trying to keep her distracted but it's hard when we're at work.