That's interesting. I get weasels hunting in daylight here. I'll look it up later but I think US weasels and European weasels may be different like the badger.The single Aseel cockerel I have is from 'working" stock. The source of that cockerel goes to great lengths to keep predators even as small as weasels away from his birds. Most of the weasel action I have dealt with has been at night. The fighting chickens are not very good at fighting in the dark, especially against a foe that is not a chicken.
Apart from the Goshawk they are the only common daytime predator here.