Horse fed 2 suppers?!!

My horse was accidentaly fed 2 supper with in a period of 2 hours. Will it effect anything? Will it cause anything? Should I worry?

Not the best thing for sure! But a lot depends on what's for dinner
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What is supper? Grain, supplements? Hay? Grass?

Just reg hi fat hi fibre (4cups) per supper

What is that? Grain? Does it have a brand name?

I wouldn't stall for sure. And a late night ride wouldn't hurt anything.
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He gets a peanut butter jar full.

Ok weights? How much in weight? Like pounds or ounces? And what is it? Your description doesn't tell a whole lot

Yes grain

Its grain (Pellets) Possibly CO-OP brand. Of High Fat High Fibre, he gets a Peanut butter jar full (aprx 4cups)..