I would guess that your predecessor stabbed at the ice layer with pointy knife instead of defrosting it properly.
Why would any pet ever claw inside your freezer?!.
This wasn’t where the ice buildup was - I guessed maybe they left the door open at some point and an animal had a nibble
Doesn’t look like claw or teeth marks. Maybe those people b3fore you tried to speed up the defrosting by punching it with a sharp object like a knife that left tese marks?
How are the marks made in the freezer
I was sure this would be a picture of the dead cat you found in the freezer