A Centaur's Solstice Wish

When making wishes on the Hunter's star...
It will take more than wishes to improve Sedgewick Icetrotter's Solstice. After being sent to the infirmary, again, for dislocating his shoulder while stringing his bow, he figures he's got a snowball's chance in hell to impress the centaur he loves. Until Corporal Ronin Creekjumper brings in two injured centaurs suffering from unusual insect bites, and Sedgewick knows how to treat them.
Ronin can't believe his good luck when Sedgewick saves his men....