Huan and Celegorm were not long both with Oromë before he gave the hound to his friend; he was grown and had all the skills the Vala taught his beasts. Celegorm’s gift of speech reached far even before he was taught that of birds and other animals thoroughly, and so they understood each other soon before that.
Soon they were not seen apart except in few places, and even there, Huan waited ever for his master.
Celegorm commanded him seldom in Valinor, or he did at times that they were oft already of the same mind. So it came too that they went together when Fëanor was banished to Formenos, while then they still ventured onto Oromë’s grounds.
And Huan was silent when Celegorm swore the oath but he still went with him though he also understood the doom.
( read more )