The Boar, The Stables, & The Birds

Author's Note:  As with the first three, this retelling of the next three Herculean Labors are fairly similar to their common tellings.  It should be noted that the Herculean Labors have been passed down through the generations by word of mouth, and that they have only been committed to writing in the past couple millenia, so different versions of the stories vary in minor ways.  However, there are some differences between this version and the other versions I read.
In the original telling of the labors, Hercules actually made a pitstop on his way to complete the Fourth Labor (capturing the boar).  He stopped to eat with some centaurs (half-human, half-horse) and ended up getting drunk when he had some very potent wine.  To make a long story short, he got upset and ended up starting a fight and killing many of them.  They retreated to their leader's house, and Hercules accidentally killed him with a poison arrow, only to find out later that it was Chiron, the centaur who served as his teacher and mentor.  I omitted this portion of the story because I am trying to present Hercules in a positive light, and he obviously really did have some anger issues.
Another major difference in some versions is that after cleaning the Augean stables, Hercules actually did try to follow through on Augeas's offer of compensation for his work (the offer was ten percent of the livestock in the stable).  Augeas refused, however, saying that Hercules did not do the work, but rather the river did.  What happened after that varies in different versions, but many say he threatened to kill Augeas or he actually did kill him, either way to teach him a lesson about honesty.