Lethargy, disinterest, changes in appetite/sleeping, hiding, anxiety, irritability all hint depression.
Symptoms
Loss of companion, family upheaval, abuse, neglect, pain, owner absence can catalyze depression.
Causes
Always rule out medical conditions first through vet exam and lab work before further treatment.
Vet Check
Added human/dog companion provides comfort, activity boost, supervision to decrease sadness.
Companionship
Predictable schedule for feeding, play, training gives sense of security.
Routine
In severe cases, prescription antidepressants/anti-anxiety meds may be temporarily needed.
Medications
Over-the-counter calming aids help some: hemp, L-theanine, chamomile, tryptophan, etc.
Supplements