Which behavior shows a lack of training in a canine?

A canine exhibiting fear or aggression in unfamiliar situations can indeed indicate a lack of training. Such behaviors typically stem from a dog's inability to cope with new experiences or environments, which suggests that it has not been adequately socialized or trained to respond appropriately. Proper training and socialization help dogs learn how to behave in various situations, reinforcing positive behaviors and reducing undesirable reactions.

In contrast, following commands quickly and performing tricks accurately demonstrate that a dog has received effective training, allowing it to respond reliably to its handler. Wagging its tail when happy is a natural behavior and indicates a dog's emotional state rather than its level of training. Therefore, fear or aggression in new situations highlights a deficiency in the canine's behavioral conditioning and ability to adapt.