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.

Do flies bother dogs?

Though these bites are certainly irritating to our pets, flies don't present the same health risks to dogs that other insects do, Sinnott. ... Flies are particularly active during the day in hot weather, she added, so if they tend to bother your dog, make sure to keep her inside during those times.

Are dogs afraid of flies?

Not all dogs are super-bothered by flies, but those that are may twitch their ears, look around frantically for the sound, and high-tail it inside or to another room if the fly just won't leave them be.