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Davies was taken to hospital after being struck from behind in the second minute of the game by Hore, who was subsequently cited by match commissioner Mike Rafter and will face a disciplinary hearing this week.
Howley is hoping for a lengthy ban.
"What Hore did has got no place on a rugby field, as far as I am concerned," Howley told reporters in Cardiff ahead of Wales' match with Australia this weekend.
"It was an absolute disgrace. He has been cited, and I am sure it won't be taken too lightly.
"Situations and incidents like that have no place on the rugby field, and it had a huge impact on the game."
Wales head coach Warren Gatland, who has put back his team announcement until Thursday because of a lengthy injury list, hopes to receive good news over the fitness of Davies ahead of this weekend's Millennium Stadium clash.
The All Blacks take on England at Twickenham on Sunday morning (NZT) in their final game of their end-of-year tour and coach Steve Hansen has drafted in Hika Elliot to cover for the likely absence of Hore and Keven Mealamu, who is struggling with a calf injury.
- additional reporting AAP