What is a potential issue with attaching a bird to a lure while training?

Attaching a bird to a lure during training can indeed lead to confusion for the bird. Birds, especially young ones or those in training, rely heavily on consistent cues and clear communication from their falconer. If a bird is connected to a lure, it may not understand why it is being physically restricted or why it cannot move freely, which could disrupt its natural instinctual behaviors. This confusion can impair its learning process, making it difficult for the bird to associate the lure with specific training goals, such as hunting or responding to commands.

While the other options touch on various concerns that might arise in training, they are not the primary issue in this context. Aggression may develop from other factors, but confusion stemming from the physical connection with the lure poses a fundamental barrier to effective training. Similarly, hindering feeding and leading to feather loss are potential consequences of various training practices but do not directly relate to the specific challenge of attaching a bird to a lure.