If you have an older or lazier dog, there's a chance that over summer you may go out to the yard one day and find him with a whole lot of flies attacking his ears. Although these flies look a lot like a normal housefly they are not. They are a nasty little blood sucking parasite that particularly like the ears of dogs (good blood supply in a dog's ear). For the months of December through to May these flies will be around and they can make life miserable for an old dog. We have a couple of options to help with this situation: Musca-ban fly spray and Fly Repella cream do a good job but both products need to be applied daily. For a longer lasting protection the spot-on product Advantix does a really good job, and it only needs to be applied monthly (and it kills fleas too).