Distinct white/silver metallic craft with discernable top and bottom flying across northern sky and disappeared. No clouds in sky.Sitting on our lanai facing north. Craft flew eastward very slowly at first. We could see a solid structure or lip on the top of the craft, and at the bottom of the craft. The center was either solid and reflecting the sun off a shiny metal surface or the center was without a solid shape and made of purely light/energy. We viewed the craft flying eastward for approximately 30 seconds... It sped up - probably double its original speed and it quickly disappeared. Looked as if it had a screen raised over it which made it invisible. no sound. no trail behind it. Sky was completely clear, no cloud cover. About two hours before sunset. We continued to study the sky for 15 to 20 minutes and it did not reappear, nor did we see it resume flying nearby. Craft seemed to be approximately 1000 feet off the ground. Vicinity has had several reports of missing and mutilated cats, reported in the news by our local police department, in the days prior to this event.