"Yes, poor Apocrita. Chitin told me that she apparently jumped into the line of fire when those ponies attacked to protect you. Given she was doing exactly as she was supposed to, I gave her my blessing to take a few days off to recover. She wouldn't do much good as your guard anyways until she recovered anyways," Chrysalis explained, easing you a bit. So Chitin was able to give a lie that excuses Ap and give him a break from covering for her. Not bad for an unlicensed medical practitioner.