I'll never forget the day I realized my cat Oliver had been hurting for months and I missed every single sign. He was 11, sleeping more, a little grumpy when I picked him up. I kept telling myself he was "just getting older." By the time I finally took him in, the vet found severe arthritis in both hips and a dental infection so bad it had started eating into his jawbone. The guilt was crushing. And the truth? I see this exact story play out with readers every single week.
Pets are wired to hide pain. In the wild, showing weakness makes you prey. So your dog or cat will suffer in silence, sometimes for years, while you assume everything is fine. I've been a pet health advocate for over a decade, and if there's one thing I want you to take away from this article, it's this: by the time you see obvious signs, your pet has likely been hurting for weeks or months. Here are the 10 signs most owners miss — and what to do about each one.
1. Behavior Changes: The Quietest Scream
This is usually the first red flag, and it's also the easiest to explain away. Your friendly golden retriever starts spending the day under the bed. Your lap cat suddenly won't sit on you. Or — and this one fools people constantly — your pet gets more clingy, following you room to room, wanting constant contact.
Both extremes mean the same thing: something hurts. Withdrawal says "I don't want to be touched." Clinginess says "I need help." I had a reader whose Lab started sleeping in the bathtub — cool tile felt good on her aching joints. The owner thought it was a quirky new habit. It wasn't.
2. Eating Changes: More Than a Picky Eater
Watch your pet eat. Not just if they eat, but how. Dropping kibble from the mouth? Chewing exclusively on one side? Hesitating before the bowl, then walking away? Those aren't picky-eating behaviors — they're signs of dental pain, jaw pain, or nausea.
Dental disease affects 80% of dogs and 70% of cats by age 3. Yet most owners don't connect bad breath with pain. That fishy, rotten smell? That's infection. A Grade 4 dental cleaning runs $300–$1,200 depending on your area, but leaving it untreated leads to abscesses, tooth loss, and bacteria that damage the heart and kidneys. I've seen it happen more times than I can count.
3. Posture: The "Prayer Position" Is Not Cute
A hunched back with the front legs down and rear end up — vets call this the "prayer position." It's a classic sign of abdominal pain — pancreatitis, bloat, or an intestinal blockage. If you see this, especially in a dog, do not wait. Get to a vet the same day.
Beyond the prayer position, look for a tucked belly, a roached back (like an arched cat all the time), or a head held lower than normal. These postures are your pet's way of splinting a painful area, minimizing movement in the torso. They're not relaxing — they're compensating.
4. Movement: The Stiffness That Sneaks Up
Does your dog take a few stiff steps before warming up on a walk? Does your cat hesitate before jumping onto the couch, then miss the landing? These are not "they're just getting older" moments — they are pain signals you can act on.
Specific things to watch for: slow to stand after lying down, reluctance to use stairs, bunny-hopping with the back legs (classic hip dysplasia sign in dogs and cats), a head bob when walking (often forelimb pain), and decreased activity overall. The average owner notices a limp. But subtle changes like "not as excited for walks anymore" or "doesn't play fetch as long" are actually earlier, more valuable signals. Joint supplements (glucosamine/chondroitin) run about $25–$50 a month and can slow arthritis progression, but only if you start early. By the time they're limping, the joint damage is already significant.
5. Facial Expressions: The Pain Face Is Real
There's a reason vets use grimace scales to assess pain in animals. Look at your pet's face right now. In a relaxed, comfortable pet: eyes are almond-shaped or softly closed, ears are in their natural position, whiskers are relaxed, and the muzzle is soft.
In a painful pet: eyes are squinted or staring with dilated pupils, ears are flattened back or to the sides, the brow is furrowed, and the muzzle is tense. Cats often pull their whiskers back tight against the face. Dogs may pant excessively even when resting, or pull their lips back in what looks like a grimace but owners mistake for a "smile." It's not a smile. If the eyes look hard or sunken, something is wrong.
6. Sounds: Whining, Groaning, and the Silence That Lies
Obvious vocalizations — yelping, whining, hissing, growling — usually send owners straight to the vet. Good. But what about the quiet ones? A low groan when lying down. A grunt when getting up. A cat who used to purr constantly but now stays silent. Or the opposite: a cat who purrs more than usual (purring releases endorphins and can be a self-soothing pain response).
Unusual silence is one of the most overlooked signs. A normally vocal dog who goes quiet, or a cat who stops greeting you at the door — that silence is not peace. It's suppression. I've had three readers email me saying, "He just seemed so peaceful." Then the X-rays came back showing advanced arthritis.
7. Grooming: Too Much or Not Enough — Both Are Bad
Cats are fastidious. A cat with a dull, greasy, or matted coat is almost certainly in pain — they can't twist around to groom because their back or hips hurt. Dogs, too: a healthy dog shakes dirt off. A painful dog may look unkempt, especially around the rear end.
On the flip side, obsessive licking of one spot — a wrist, a hip, a patch of belly — is a common pain signal. That spot hurts, and licking releases endorphins. You might see a bald patch or hot spot. My own Oliver spent hours licking his hip. I thought it was a habit. It was arthritis. Hot spot treatment can run $100–$300 at the vet, but treating the underlying pain is what actually stops the behavior.
8. Sleep Patterns: More Is Not Always Restful
Pain is exhausting. Many painful pets sleep 2–4 hours more per day than their healthy counterparts. But it's not restful sleep — they wake frequently, change positions constantly, and never seem to settle into deep REM sleep. You might notice your dog circling endlessly before lying down, or your cat moving from spot to spot all night.
Other painful pets go the opposite direction: they can't get comfortable at all. Restlessness, pacing at night, panting without exertion, and getting up and down repeatedly are all signs they're searching for a position that doesn't hurt. Orthopedic beds (I recommend ones with egg-crate foam, starting around $40) can help, but they're a comfort tool, not a treatment. If your pet is changing sleep spots 5+ times a night, see a vet.
9. Temperament Changes: When Sweet Turns Sour
The sweetest dog who suddenly growls when you touch their back. The velcro cat who hisses when picked up. The parrot who starts biting for no reason. Temperament changes are pure communication: "That hurts, stop it."
Never punish this behavior. Your pet is not being "bad" — they're in pain and using the only language they have. If you punish or scold, they learn to hide pain even deeper. Instead, note exactly where they reacted (left hip? lower back? mouth?) and bring that information to your vet. It's a treasure map to the source of pain.
10. Bathroom Accidents: The Embarrassing Sign
A house-trained dog who starts having accidents. A litter-box-perfect cat who suddenly goes on the rug. Most owners assume it's a behavioral problem or spite. It's almost never that. Squatting or posturing to eliminate is physically demanding. A pet with arthritis in the hips or spine may not be able to squat fully, leading to leaks or incomplete emptying. A pet with urinary pain (UTI, crystals, stones) may strain, go frequently, or cry while urinating.
Cats are especially vulnerable: litter boxes with high sides are impossible for a painful cat to enter. If your cat is eliminating outside the box, check two things first: a vet visit for a urinalysis (UTIs in cats are common and painful, around $50–$100), and switching to a low-entry box or cutting a door into a storage tote. Nine times out of ten, it's pain, not malice.
The Pain Scale: What the Vet Uses (0–10)
Veterinarians assess pain on a scale. Here's what it looks like in plain English so you can describe what you're seeing:
- 0: Comfortable. Normal behavior, eating, playing, resting normally.
- 1–3 (Mild): Subtle changes. A little quieter. Slight stiffness. Still eating. Most owners spot nothing.
- 4–6 (Moderate): Obvious changes. Limping, reduced appetite, hiding, vocalizing, changes in sleep. This is where most pets live for months.
- 7–10 (Severe): Constant distress. Crying, not eating, unable to rest, tremoring, guarding a body part, sometimes aggressive. Emergency vet time.
A Story That Still Breaks My Heart
My Oliver was a 12-pound tabby with giant green eyes and a purr that sounded like a tiny motorcycle. For about six months, he slept more, stopped sleeping on my chest (too painful for his hips), and started missing the landing when jumping onto the windowsill. I told myself he was "slowing down with age." My vet — who I trust completely — gently suggested arthritis, but I brushed it off. "He's fine," I said. "He still eats."
By the time I finally agreed to X-rays, the damage was severe: advanced arthritis in both hips, bone spurs along his spine, and a tooth root abscess that had been festering for months. The guilt I felt is hard to describe. He'd been hurting. Every single day. And I didn't see it because I was looking for the wrong things — limping, crying, obvious distress. What I got instead was subtle. Quiet. Misleading.
Oliver lived another four happy years on joint supplements, pain medication, and dental care. But those four years could have started six months earlier if I'd known what to look for. This article is my way of making sure you don't make the same mistake.
The Most Important Warning: Never Give Human Pain Meds
I cannot say this strongly enough: Ibuprofen (Advil, Motrin) and acetaminophen (Tylenol) can kill your pet. A single 200mg ibuprofen tablet can cause kidney failure in a 10-pound dog. One acetaminophen tablet can destroy a cat's red blood cells in hours — it's often fatal even with emergency treatment.
I get it. Your pet is hurting, the vet is closed, and you want to help. Please don't. Even "dog-safe" pain meds from the pet store can be dangerous if misused. The only safe course is a veterinary exam and prescription. Cost of an exam: $50–$100. Cost of a funeral: priceless grief.
Instead, call your vet's emergency line. Many will advise you over the phone. Some even offer tele-triage for $20–$40. Whatever you do, do not reach into your own medicine cabinet.
What to Do Right Now
If any of this sounds familiar — if your pet is showing even one of these signs — here's your checklist:
- Schedule a vet appointment. Say "I'm concerned about pain" when you call.
- Take videos of the behavior you're seeing at home.
- Write down when it started and how often it happens.
- Check your pet's body: run hands gently over their back, hips, legs, and belly. Note any flinches, heat, or swelling.
- Switch to a low-entry litter box or add ramps to furniture if you suspect mobility issues.
Your pet can't tell you they're hurting. But they're telling you in every way they can. It's up to us to listen — with our eyes, our hands, and our hearts. I learned that lesson the hard way so you don't have to.
