Because diagnosing an animal concussion is harder than diagnosing a human concussion. Animals can’t tell you if they have a headache, light sensitivity, nausea

Because diagnosing an animal concussion is harder than diagnosing a human concussion. Animals can’t tell you if they have a headache, light sensitivity, nausea, etc. You would only be able to diagnose the worst class 3 concussions where the animal can’t even walk straight. It’s probably not ethical to subject animals to that much pain if you can’t even confirm half of the injuries.