I don't know about the first 6 years of her life, but nothing happened in the 14 that I've known her.
I say she's electric current sensitive because she is an excellent electric fence tester. She doesn't actually touch the wire, but makes a motioning movement towards it with her muzzle. Guaranteed if the current is down, she will go right through to green pastures.
One winter my husband bought me a de-icer for the water tank. After 2 days I realized T hadn't gone near it. As soon as I took it out, she drank and drank. Walka had been drinking right along so I know it wasn't malfunctioning, plus I had Don check it out. Tried again, T wouldn't go near it all day. Gave up using it.