What does Buck frequently remember from his life as a domesticated pet?

Buck frequently recalls his comfortable life with Judge Miller as it represents a stark contrast to his experiences in the wild. This memory encompasses the security, warmth, and ease he enjoyed as a domesticated pet, highlighting the sense of belonging and care he once had. The fond recollections of his home life serve as a reminder of his previous identity and the comforts of civilization, which he deeply misses as he confronts the harsh realities of survival in the wilderness. The other aspects, such as the harshness of winter, the thrill of the hunt, and his fears of the wild, may play a role in shaping his current experiences, but they do not evoke the same sense of nostalgia for a past life filled with comfort and affection. Buck’s memories of home illustrate the theme of lost innocence and the struggle between civilization and the primal instincts awakened within him.