This 'ole grey mare' is 29 years old. I've had her for 27 of those years. I cannot say enough about her right now... so I'll just tell you, she's priceless. I caught her taking a break in front of the trough. I am waiting for the day to get a little of Nature's vitamin D, myself.
(Sorry for the graininess of the pic- it was taken from f-a-r away.)