When a dog foams on an empty stomach in the morning, it may be because he has been hungry for too long, or he may have caught a cold. If the dog has other symptoms, he is probably sick. We need to find out if he is willing in time. If you are sick, take them to the hospital for examination and treatment as soon as possible. When raising dogs, you should also pay more attention to their physical condition.

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Generally, sick dogs will have loss of appetite, lethargy, reluctance to move, and slow reaction times.