There’s no clinically validated “dog depression quiz” you can take online for a diagnosis, but you can systematically evaluate your dog’s behavior at home using the same signs veterinary behaviorists look for. Below is a practical checklist to help you assess what’s going on, along with guidance on what the signs mean and what to do next.
A Behavioral Checklist for Dog Depression
Go through each of the following questions honestly, thinking about how your dog has behaved over the past two weeks compared to their normal baseline. The more “yes” answers you give, the more likely something is affecting your dog’s emotional or physical well-being.
- Appetite changes: Is your dog eating noticeably less than usual, or refusing food they normally enjoy? Conversely, are they overeating or scavenging more than before?
- Sleep changes: Is your dog sleeping significantly more during the day, or seeming restless and unable to settle at night?
- Loss of interest: Has your dog stopped getting excited about walks, toys, or activities they used to love?
- Withdrawal: Is your dog hiding, avoiding family members, or spending more time alone in another room?
- Low energy: Does your dog seem unusually sluggish, slow to get up, or reluctant to move around?
- Clinginess: Is your dog following you constantly or seeming anxious when you leave, more than before?
- Vocalizing: Is your dog whining, howling, or barking more than usual without an obvious trigger?
- Licking or grooming: Is your dog excessively licking their paws, legs, or body to the point of creating bald spots or sores?
- Flat affect: Does your dog seem emotionally “blank,” not responding to things around them with their usual expressions or tail wags?
If you checked three or more of these, your dog is showing a pattern of behavioral change worth investigating. One or two in isolation could reflect a bad day or a minor stomach issue. A cluster of changes, especially ones that persist for more than a couple of weeks, points to something more significant.
What These Signs Could Mean Besides Depression
Here’s the critical thing to understand: every single sign of dog depression also overlaps with signs of physical illness or pain. A study of veterinary behaviorists’ cases found that between 28% and 82% of patients brought in for behavior problems showed signs of pain. That’s a staggering range, and it means the very first step when your dog’s behavior changes is ruling out a medical cause.
A dog with an undiagnosed thyroid problem will look lethargic and disinterested. A dog with joint pain will stop wanting to play and may withdraw. Dental disease can cause a dog to refuse food. Gastrointestinal issues can disrupt sleep. Before concluding your dog is emotionally depressed, a vet visit with bloodwork and a physical exam is essential. If a medical condition is causing the behavior, treating it often resolves the “depression” within days or weeks.
For dogs over seven, cognitive decline is another possibility. Canine cognitive dysfunction syndrome is a progressive condition similar to dementia in humans. Veterinary researchers now recommend that vets begin screening dogs for cognitive changes around age seven using behavioral questionnaires, with more detailed assessments every six months starting at age ten. Signs include disorientation, disrupted sleep cycles, house soiling, changes in social interactions, increased anxiety, and altered activity levels.
Common Triggers for Dog Depression
When a medical cause has been ruled out, depression in dogs tends to be tied to a specific event or change in circumstances. According to veterinary behaviorist Dr. Sinn, it’s almost always context-specific. The most common triggers include:
- Loss of a companion: Grieving the death of a household pet or a family member is one of the most recognized causes.
- Major environmental change: Moving to a new home, being rehomed, or significant shifts in household routine.
- Changes in the social group: A new baby, a new pet, a child leaving for college, or even a shift in your work schedule that changes how much time you’re home.
- Social isolation: Dogs left alone for long stretches without adequate interaction.
- Lack of stimulation: Not enough physical exercise or mental engagement.
- Trauma: Injury, abuse, or prolonged stress. Some of the most severe cases come from dogs rescued from hoarding situations or other extreme neglect.
Think back to what changed in your dog’s life around the time the behavior started. Even changes that seem minor to you, like a different daily schedule, can feel significant to a dog whose entire world revolves around your routine.
How Vets Assess a Dog’s Well-Being
Veterinarians don’t have a blood test for depression. Diagnosis is based on a detailed behavioral history, observation, and the process of eliminating medical explanations. Your vet will ask when the changes started, what happened around that time, and how severe the symptoms are. They’ll perform a physical exam and likely run diagnostics to check for pain, hormonal imbalances, or organ dysfunction.
One structured tool that veterinary professionals use is the HHHHHMM Quality of Life Scale, which scores seven categories from 0 to 10: hurt, hunger, hydration, hygiene, happiness, mobility, and whether the dog has more good days than bad. A total score above 35 (out of 70) is considered acceptable quality of life. The “happiness” category specifically asks whether the pet expresses joy and interest, responds to their environment, or appears depressed, anxious, or fearful. While this scale was originally designed for end-of-life decisions, its framework is useful for any dog owner trying to objectively evaluate how their pet is doing.
What Helps a Depressed Dog
In many cases, dogs simply need time to adjust. This is especially true after a loss or a major household change. The exact timeline varies from dog to dog, and there’s no standard recovery period. Some dogs bounce back in a few weeks, others take months.
What you can do during that period matters. Enrichment, both physical and mental, is one of the most effective interventions. Dogs have innate needs to play, chase, sniff, chew, and scavenge, and satisfying those drives directly improves emotional well-being. Specific strategies include:
Food puzzles turn every meal into a problem-solving activity. Something as simple as distributing kibble across a muffin tin with toys placed on top, or stuffing treats inside a folded cardboard box, gives your dog a chance to work for their food instead of eating from a bowl in 30 seconds. Snuffle mats, where kibble is hidden throughout a textured fabric mat, are another easy option.
Scent games tap into your dog’s strongest sense. Start by saying “find it” and tossing a treat nearby. Once they understand the game, gradually increase the difficulty by hiding treats around the house. On walks, let your dog set the pace and stop to sniff as much as they want. Sniffing is both stimulating and calming.
Physical activity and novelty help too. Indoor agility courses made from household furniture, flirt poles (a toy on a rope attached to a stick), and new walking routes all break up monotony. The goal is to re-engage your dog’s curiosity and give them reasons to be active.
Maintain a consistent daily routine. Predictability helps anxious or depressed dogs feel secure. Keep mealtimes, walk times, and bedtimes as regular as possible.
When Medication Becomes Part of the Plan
If behavioral changes persist despite environmental adjustments and enrichment, or if the depression is severe, your vet may recommend medication. Two drugs are FDA-approved for behavioral issues in dogs, both originally developed for humans. These are the same classes of antidepressants people take: one is an SSRI (which increases the brain’s available serotonin) and the other is a tricyclic antidepressant. Both are specifically approved for separation anxiety, though vets sometimes prescribe them for related conditions.
Medication alone isn’t typically the answer. The standard approach pairs it with behavioral modification and environmental changes. Your vet may also refer you to a board-certified veterinary behaviorist, who works alongside your regular vet to develop a treatment plan. The behaviorist provides guidance while your primary vet handles the physical exams, diagnostics, and prescriptions.
The timeline for medication to take effect varies, but most behavioral medications in dogs need several weeks of consistent use before changes become apparent. This isn’t a quick fix, and adjustments to dosing are common during the early phase.