I'm very sorry for your loss, I know how difficult it is. There's a very corny song that I listen to from time to time that makes me both smile and cry thinking about the dogs I've lost, I'm pretty sure it's the official anthem for the Rainbow Bridge.
I can hear those echoes in the wind at night
Calling me back in time
Back to you
In a place far away
Where the water meets the sky
The thought of it makes me smile
You are my tomorrow
I will see you again
This is not where it ends
I will carry you with me