Answer: What might have happened is the roots were suffocated by adding the steer manure on top of the soil. It was good you removed the manure. Don't add more soil above the existing soil line. The roots will dieback. Also, steer manure can sometimes be high in salts. So flush the soil with water to remove any accumulated salts. If you're really worried about the plant, try repotting with fresh soilless mix.
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