It's actually very logical and reasonable. As someone else mentioned, dogs are very forgiving and can often "guess" what it is we want even if our timing is way off when we are training them. They are extremely adept at reading our body language and when people are working with dogs they are often subconsciously relying on this fact as they are training. This can result in sloppy timing, which can result in less effective clicker training. Also, many people get caught up in the idea that dogs are in it not only for the reward, but also to "please" us (it's not that they don't want to please us per say, but past experience has taught them that when we are happy good things happen to them). People have no such expectations of chickens, and chickens do not naturally read our body language nor do they usually grow up in an environment where they would see a significant amount of it to learn it (they use a new batch of chickens with each camp). Clicker training chickens requires you to master the skill of the clicker, exact timing, and shaping in a way that you can not learn working with dogs. These exact same skills can then be used to make you a more effective dog trainer.
