In the winter, Mathilda prefers her feed from store X rather than store Y. It’s a national feed. The bags are identical. No one from either store can tell us what the difference is. But rest assured, there is a difference.
In the summer, she will eat feed from either location.
This is not out of character. [Carrot Snob Redux]
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Gratuitous Clothing Picture
My new barn jacket. Specs here (but not price). Mmmmm, winter warmth. Happiness.
Virtual Brush Box 
Sounds like you’ll need that jacket today! Warm is good 🙂
You were that way with milk. Since you were a picky eater, you drank a lot of milk. In fact, you were a veritable connesieur of milk. Some brands you wouldn’t drink. I never figured out how you did it.
Like attracts like.
The same thing happens when I move to a new area of the country. The milk tastes weird.
It seems like your horse inherited your pickiness.
K: Not my horse!
M: Not my human!
OTOH, the unifying thread is my husband. He chose both of us. Hmm.
It’s great to have a scapegoat… I mean husband