It appears as if cow manure was too strong for one of my shrubs. It appears to be dying. I have attempted to remove most of the manure, and have been watering ++. Is there anything else I can do?
What you are doing is correct. Here is more about this problem, known as fertilizer burn (but it applies to manure as well):
Manure should be "cured" or composted before applying to plants in order to reduce the risk of fertilizer burn and prevent the spread of plant diseases or weeds: