Okok so ..
There's a short story based on Laika. Though instead of a dog, Laika is in a form of a child being adopted off the streets if I remember correctly. The child is given tasks and experiments throughout the whole manga Along with other children which I assume are other animals irl. Throughout the story. It is shown the emotions the child goes through; their thoughts on their "masters", on the experiments, and on the death of their friends who are experiencing the same thing. It is really tragic to know what a dog or any living being would feel under these conditions.
I'm not really sure when I read this short story but it was a couple of years ago and I can't seem to find it since then. If anyone happens to know the name of it please reply to this. Thank you either way.
Raws?
@rinie_fujoshi on Instagram has some if that helps