The border traverses a variety of terrains, ranging from major urban areas to uninhabitable deserts. Approximately 350 million legal crossings occur annually, and is the most frequently crossed border in the world. The total length of the continental border is 1,954 miles (3,145 km).
Only a veterinarian will know what's wrong with your dog but usually stumbling, wobbling and falling down is associated with neurological problems, especially if there aren't any other signs. I would really take him to the vet as soon as you can.
A sedentary person can't just jump off the couch one day and run 5 miles, and neither can a sedentary dog, says Aramburu. Too much too soon increases your dog's risk of injury, just as it would a human's.. Find a beginner 5K training plan that will let you and your pooch progress at a safe, healthy pace.