I am interested in the phrase "broken reed". My assumption is that it is something that can't be fixed. Is this correct?
Also, I read the section under "get your goat". It was my understanding that racehorses are very skittish if left alone, but won't sleep well with other horses, so they would be stabled with a goat as a non-threatening, non-stimulating and calming companion. To improve chances of winning a race an unscrupulous competitor might hire someone to steal the goat from the opponent's stable on the night preceding the contest. The connotation would be that this would rile up the horse. Thus, if someone "gets your goat" they rile you up.