Spaying removes both the uterus and both ovaries and is crucial in the prevention as well as the treatment of mammary cancer. SIMPLE CONVENIENCE. The female dog comes into heat every 8 months or so. There is a bloody vaginal discharge and attraction of local male dogs.
Tired eyes can come from any number of activities. Some of the most common include working on the computer for too long, poor lighting conditions, driving a car for prolonged periods of time, reading for long periods, or any other activity that may require the eyes to maintain intense focus for long periods of time.
Slideshow: How Your Vision Changes as You Age. Staring at computer monitors, smartphones, and video game screens may result in strained, dry, and tired eyes. Luckily, using these devices does not seem to have permanent effects. To prevent eye strain, adjust your computer monitor so that it's 2 feet in front of you.