9- Fainting, Collapsing
If your dog collapses, and recovers quickly then there is nothing to worry about. Otherwise there might be a potential problem with the nervous system (brain, spinal cord or nerves), the musculoskeletal system (bones, joints, muscles), the circulatory system (heart, blood vessels, blood), or the respiratory system (mouth, nose, throat, lungs).
10- Red Eye(s)
If the white area of the eye turns red then it might include diseases involving the external eyelids, the third eyelid, the conjunctiva, cornea, or sclera of the eye. These symptoms should be investigated immediately by your veterinarian.