Dogs hate flies for a simple reason: flies are annoying pests and dogs seem to despise them just as much as we do. We can't blame them though, deprived from having hands, dogs are pretty much at the mercy of these buzzing, pesky creatures. These leaves them with only one option: attempting to catch them with the power of their jaws.
You may have noticed how your dog's pupils get big when playing and may be wondering why that happens. Interestingly, this is not something exclusive to dogs. Many cat owners report seeing this happen in their kitties as well. In order to better understand this, it helps to learn a little bit more about how a dog eyes' work and the influence of the nervous system.
Some dogs hate collars and this can obviously put a dent in their ability to enjoy walks and the many perks of being present in the outdoor world. Often, this peculiarity derives from underlying issues such as fear, touch sensitivity and inappropriate or insufficient handling when the dog was a puppy.