How long can a guy leave a skinned thawed beaver hide say in the fridge before fleshing and boarding?

When they start looking shiny, slimy and smelling funky.

I never keep them longer than 3 days and sometimes thats almost too long. The key is to make sure they are super dry on the fur side before putting them in the refrigerator.

I would say 5 to 7 days,but that is a guess because I have never left them sit in the cold room that long.
Beaver keep longer than other pelts.
I have kept them in the cold room for 4 days after skinning.Just make sure they are folded leather to leather.If any skin is exposed it will dry in the cold room or fridge.

5-6 days is about right. Through necessity I've done that many times. Dry fur side helps a lot. It also depends on how many days the beaver sat before you skinned it. Can't have a beaver sit at above freezing temps for 5-6 days skin it, and then another 5-6 days with pelt in the fridge.

Gotcha. This was more like laid them out from being froze on the table for awhile then finished letting them thaw in the shop fridge. Something came up where I couldn’t get to them as planned. When the were skinned it was the same day as collection and put right into the freezer