How do I unlock old goat?

Excuse me, but I'm having some trouble unlocking an old goat in my possession. Could you possibly walk me through the process step-by-step? Is there a specific set of instructions or a certain method I should be using? I've tried a few things already, but nothing seems to be working. Could you offer any advice or insights that might help me solve this mystery? I'm quite intrigued and would appreciate any assistance you can provide.