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.
1 If your dog is not drinking an adequate amount of water, seek veterinary advice. 2  Monitoring water intake is especially important if heâs recovering from diarrhea, vomiting or other illnesses. 3  Purchase a water bowl with a weighted bottom to prevent your dog from knocking it over. Generally, a dog needs at least one ounce of water for each pound of body weight per day. 2  If your dog is not drinking an adequate amount of water, seek veterinary advice.