Hair Loss in Dogs and Cats - Causes, Signs & What You Can Do

When you’re cuddling your cat, and your fingers brush against a small bald patch near her neck. Or you’re brushing your dog, and suddenly notice the fur looks thin around his tail.

Your first reaction? Probably a mix of worry and confusion. “Is this normal shedding… or is something wrong?”

The truth is — hair loss in pets (dogs and cats) isn’t just about fur. It’s a signal. Sometimes it’s harmless seasonal shedding, but sometimes it’s your pet’s way of saying, “Hey, I need a little help here.”

Let’s decode what’s really happening under that coat — and how you can help your furry friend feel their best again.

What Causes Hair Loss in Dogs and Cats?

When you see fur thinning or bald patches, you’re not alone — this is one of the most common concerns vets hear.

Here are the 5 most common causes of hair loss in dogs and cats:

1. Parasites & Infections

Fleas, mites, or ringworm can wreak havoc on your pet’s skin. They irritate, they itch, and your pet scratches or licks until the fur’s gone. If your pet’s losing hair in small circles or scratching nonstop, it’s time for a vet visit.

What it looks like: Red bumps, scabs, "flea dirt" (black specks), intense scratching even when you don't see fleas.

2. Allergies

Just like humans, pets can react to pollen, dust, or even food ingredients. When that happens, they lick or chew their skin, leading to localized bald spots. You might also see redness or scabs — classic signs of allergic irritation.

What it looks like: Chronic itching, red/inflamed skin, hot spots (moist, painful patches), ear infections, excessive paw licking.

3. Hormonal Imbalances

Conditions like hypothyroidism or Cushing’s disease can thin your pet’s coat from the inside out. You’ll notice symmetrical bald patches, dull fur, or slow regrowth. This is a deeper health issue — best checked by your vet with simple blood tests.

What it looks like: Symmetrical hair loss on both sides of the body, no itching, skin changes (thin, darkened, or calloused).

4. Stress & Over-Grooming 

Yes, pets stress too. Moving homes, new pets, changes in routine — all can trigger stress-induced over-grooming. For cats especially, bald thighs or belly areas often mean anxiety more than allergies. Try to notice if the bald patches appear after big life changes.

What it looks like: Clean-cut, stubble-like hair (looks "barbered"), only in areas the pet can reach, worsens when stressed or alone.

5. Nutrition Gaps

Fur is made of protein — so poor diet, low-quality kibble, or lack of Omega-3s can show up right on the coat. Healthy coat = balanced diet. Think fish oil, lean meats, and nutrient-rich foods.

What it looks like: Dull, dry, brittle coat, hair falls out easily, hair loss all over the body (not in specific patches).

Shedding vs. Hair Loss — How to Tell the Difference

Here’s a quick way to spot normal shedding vs pathological hair loss (alopecia in pets) 👇

If you’re seeing signs from the right column — don’t panic, but do schedule a vet check. Early attention makes recovery much easier.

What You Can Do — Practical Steps to Help Your Pet Regain a Healthy Coat

Here’s your simple action plan if your dog or cat is losing hair:

1. Check for parasites 

Use flea combs, keep up with year-round prevention, and clean bedding weekly.

2. Upgrade their diet 

Add Omega-3s and high-quality proteins. Ask your vet about skin-support supplements.

3. Groom gently and regularly 

Use tools that remove loose fur without irritating the skin.
For example: Delomo’s Zoe Pet Grooming Gloves — soft silicone tips that mimic your touch while keeping fur under control.

4. Minimize stress

Create cozy, predictable spaces. Play daily. For cats, add vertical climbing options.

5. Track patterns

Keep notes: When did the shedding start, any new food, stress, or products?
Patterns help your vet find the root cause faster.

Caring for Their Coat Is Caring for Their Confidence

Your pet’s coat tells a story. Sometimes it’s shiny and full — sometimes it’s thin and patchy. Both are okay, as long as you’re listening.

By spotting the early signs, feeding right, and grooming with care, you’re not just helping fur grow back — you’re helping your furry friend feel safe, loved, and confident again.

So the next time you see fur on the couch or a thin patch on your pup’s back —
pause, breathe, and remember: Every strand tells you something. Listen with love.

FAQs

1. How long does it take for pet hair to grow back after treatment?

It depends on the cause, but generally 6-12 weeks. Hormonal hair loss may take 3-6 months. Hair from genetic conditions may never fully return.

2. Can I use human hair products on my pet?

No. Human shampoos have the wrong pH for pet skin and can cause irritation. Always use pet-specific products recommended by your vet.

3. Is hair loss in senior pets just "old age"?

No. While senior pets are more prone to hormonal disorders, hair loss is not a normal part of aging and should always be evaluated by a vet.