So thinking there must be something that does not smell quite right in the bucket, I poured her grain into a different bucket. Same thing. So thinking there might be something wrong with the grain, I opened one of the new bags and gave her fresh grain. Same thing.
This is really odd. I put the grain in my hand and held it out -- she gobbled it up. I kept hand feeding her and wondering what the hell was going on with this horse.
We go outside to start cleaning the pasture. As I am cleaning I keep watching Divna. I noticed she was standing by the water trough. She didn't go for the hay, she kept standing by the water trough. I told John, "It's like she wants to drink, but won't." So we both went up to where she was. John stuck his hand in the water and said, "Well, I'm not getting a shock. At first I thought maybe the water heating element malfunctioned and was shocking her."
So I got a five gallon bucket and filled it with water. Divna drank and drank from that bucket until it was empty! I filled it again, she drank half of it. Then she immediately went for the hay.
I looked at Divna, and at John. It occurred to me that he had on rubber soled shoes. I decided to take my shoes off and try the water. No shock. I looked at Divna again and realized that she is barefoot. So I took off my socks.
That time when I put my hand in the water I got a shock! Problem solved -- John had grounded the metal water tank to the electric fence. Obviously something had gone wrong recently - a short or something. Now every time the fence pulsed with electricity a shock went through the water.
It is getting warmer here now (finally) so we removed the heating element and disconnected the ground. But by now both horses had been "trained" to not drink out of the trough. So we moved it thinking/hoping that would make a difference.
It took a couple of hours, but finally, after a lot of coaxing and splashing in the water by John, they got the courage to drink out of the trough again.
I felt horrible!
We were electrocuting our horses!!!!