• He is lethargic.
  
• He acts depressed.
  
• He does not want to play or go for walks.

What to do?

While some signs of illness are general and can be indicators of any number of dog diseases or acute problems, other symptoms point to specific, common maladies. Mark everything you see and hear down in your dog's medical diary, and get to the vet as soon as you spot a problem. If you take your dog for a checkup every year and generally keep up with normal preventive care, you'll usually be able to nip any problems in the bud.

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