Bad teeth and mouth pain severely lowers interest in chewing kibble. Check for oral inflammation blocking enjoyable eating.
Dental Discomfort
Smell is tightly linked with taste for dogs. Respiratory issues like kennel cough means food smells "off" so goes uneaten.
Nose Out of Joint
Nausea from dietary indiscretion, parasites, overeating, viruses turns dogs off fresh food until their infection passes.
Upset Stomach Issues
Emotional upsets from loss, neglect, change, trauma induces stress hormones suppressing appetite inhibition.
Depression or Stress
Arthritis, injury, or age making movements to food bowls painful leads to eating reluctance.
Decreased Mobility
Chronic conditions like kidney disease, cancer and other disorders create complications making dogs disinterested in food.
Underlying Illness
Bad kibble/cans, unwashed bowls with film and lingering stink puts fastidious dogs off their former favorite meals.
Moldy Food or Bowls