If a dog suddenly runs crazy and foams at the mouth, it may be caused by poisoning or rabies. Dogs may accidentally eat highly toxic foods such as rat poison and cockroach poison, which may cause poisoning. This can damage brain nerves and cause the dog to foam at the mouth and have an unsteady gait. It is recommended that owners take prompt measures to induce vomiting. Then enema, infusion and other methods are performed to promote the elimination of poisons.

If a dog suffers from rabies and exhibits the above symptoms, along with photophobia, water and biting behavior, it is recommended that the owner contact the relevant departments in time. Dogs suffering from rabies are contagious.