Gettin' your Goat!

WHAT DOES THAT MEAN? I don't know, so I thought I would look it up.. For someone to "get your goat"......hmmm we have alot of "old sayings" that fit right into our lives, but do we ever sit and wonder exactly what they mean. This one came to mind because of the gentleman (goat) in the neighbors back yard. The more I thought about it, the more I realized I had no idea what it meant. SOOOOOO I looked it up. The power of the internet is simply amazing, and here is what I came up with.
This apparently refers to an old English (Welsh?) belief that keeping a goat in the barn would have a calming effect on the cows, hence producing more milk. When one wanted to antagonize/terrorize one's enemy, you would abscond with their goat rendering their milk cows less- to non-productive.
This explains the expression in modern America: "Don't tell people where your goat is tied up --- then they can never get your goat". Meaning if another doesn't know your weakness s/he can't use them against you. (taken from web site www.rootsweb.com/genepool/sayings.htm , listed as Ye Old English Sayings if the link does not work.... Enough for now, My brain hurts.....