I read something once which kinda helped me after our Tasha died. It was, if you have a remaining dog, talk to that dog, out loud, about the other one. That way, you are pouring out your feeling and thoughts about the departed one, and honoring them by keeping their memory, their quirks and funny habits and cuteness in your mind. And when you are talking to your other dog, they just know that you are spending time with them and talking to them

So Snoop will be basking in your love and attention while you tell him how great Chase was. And still is!! in your memory.
We got a new dog really soon after Tasha's death, adopted him from the shelter, like less than 2 months, it was NOT my idea, I did not want to get to know another dog so soon...I thought I needed to devote mourning and honoring time to Tasha, and didn't want to dishonor her memory by 'replacing' her with someone else!! I was really resistant to Eddie...but now i tell Eddie every day that he is the best dog in the world

and such a good boy. And I know I will have to go through with him, what you are going though with Chase, and that sucks but I can't think about it.