Over the past week or two, as the weather has been getting warmer, Cosmo has become obsessed with chasing after and catching flies. He barks and whines to get them and will climb any furniture around to try to get up close to them. He particularly is interested in buzzing insects, like bluebottles. I have a feeling this behaviour will escalate. He is only 6 months old. While not many insects get into the house, its impossible to keep them all out. Has anyone any advice or tips on this subject?