{An earlier anecdote from Aelian explains part of the fallout between the two philosophers).
“Plato used to call Aristotle Pôlos [the Foal]. What did he wish with that name? Everyone knows that a foal, when it has had its fill of baby’s milk, kicks its mother. Thus Plato was signaling a certain ingratitude on Aristotle’ part. Indeed, Aristotle received the greatest seeds of Philosophy from Plato and then, though he was filled to the brim with the best ideas, he broke with Plato rebelliously. He founded his own house, took his friends on Plato’s walk, and set himself up to be Plato’s rival.”
῾Ο Πλάτων τὸν ᾿Αριστοτέλη ἐκάλει Πῶλον. τί δὲ ἐβούλετο αὐτῷ τὸ ὄνομα ἐκεῖνο; δηλονότι ὡμολόγηται τὸν πῶλον, ὅταν κορεσθῇ τοῦ μητρῴου γάλακτος, λακτίζειν τὴν μητέρα. ᾐνίττετο οὖν καὶ ὁ Πλάτων ἀχαριστίαν τινὰ τοῦ ᾿Αριστοτέλους. καὶ γὰρ ἐκεῖνος μέγιστα ἐς φιλοσοφίαν παρὰ Πλάτωνος λαβὼν σπέρματα καὶ ἐφόδια, εἶτα ὑποπλησθεὶς τῶν ἀρίστων καὶ ἀφηνιάσας, ἀντῳκοδόμησεν αὐτῷ διατριβὴν καὶ ἀντιπαρεξήγαγεν ἐν τῷ περιπάτῳ ἑταίρους ἔχων καὶ ὁμιλητάς, καὶ ἐγλίχετο ἀντίπαλος εἶναι Πλάτωνι.
