Since it has dried you should be good to go. Goat manure is well balanced when it comes to N,P,K as long as the animals had a good and varied diet.
If it was fresh however, then you need to treat it like any other ruminant manure and
compost it prior to use.
The reasons you want to compost or age cow manure are the same reasons you want to treat goat or sheep manure the same way, pathogens.
Composting manures is more about killing off pathogens than it is about regulating nutrients.
Redhawk