You know I really love you, don't you, Tropey? We've had some real good adventures together, but...
Well, Poppa says times is gettin' tough, Tropey. Real tough. The Government is comin' after you, and... well, I gotta let you go back to the forest where you came from.
Don't look at me like that, Tropey! You know what'll happen if we keep you! Go on, get out of here! It's for your own good, damn it! Shoo! I gotta leave you behind, and there ain't two ways about it! Go!
... Goodbye, Tropey. I'll miss you. *sniffle*
When a character or animal is sent away, it's this trope. Subtrope of Shoot the Dog and sometimes Unsuccessful Pet Adoption and Not Used to Freedom. Compare to Break His Heart to Save Him, But Now I Must Go, It's Not You, It's My Enemies, Line in the Sand, Shoo Out the Clowns. (Get out of the plot while you can, Tropey, Anyone Can Die now!)
Some specific reasons for sending an animal/friend away, drawn from the examples below:
To send an animal back to live in the wild where it belongs.
To put someone in a better situation for them.
To get them out of a dangerous situation.
To keep them from following you into a dangerous situation.
The animal itself is dangerous, such as an exotic animal, beast god, space alien, etc.
Don't be surprised if, despite your best effort to spare them, they decide that You Are Worth Hell.
