Canine distemper might sound like a relic of the past, but don’t be fooled — it’s still pretty common, especially among unvaccinated dogs. This highly contagious virus can wreak havoc on a dog’s respiratory, gastrointestinal, and nervous systems, and it spreads easily through virus particles in a dog’s urine, saliva, and respiratory secretions. Knowing the signs can be a lifesaver. Here are five telltale signs that your dog might be battling canine distemper. 1. Respiratory and Eye SymptomsAlong with a runny nose and watery eyes, most dogs with canine distemper will also have a fever. Image: U…