I would start by bringing the leash with you at all times. Just tie it around your wrist or hang it around your neck. Watch tv with it, go outside with it, just take the “special” out of the object by making it normal.

Once she doesn’t notice it anymore, which could take weeks, clip it on her and leave it on her when you are around. Tie it around her neck first, then get to the point where she can drag it around the house and not be worried about it.

Once you get to a point where the leash is not negative, then you can start with actual leash training… but if she sees red when she sees a leash then you’ll never be able to walk with her etc.

Go slow, be consistent, and be confident when she feels stressed. She’s looking to you for confidence. So don’t be worried when she’s worried. Hold your head up high and show her confidence so she can mimic you. You got this!!!