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I find at least half the time I "miss click" on the feed icon over the Prized Animal Barn which activates/opens the Barn and results in nothing getting feed and no resources gained.
When I exit out of the Barn the feed icon is gone and no way to feed the animals until tomorrow.
I'm 100% certain that no feed is being consumed and no resources gained. It's happened 3 times to me today: 1/ 1st thing in the morning; 2nd after completing Co-op goals; and 3rd after gaining a level.