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Home / Breed / Why Some Maine Coons Have Curly Belly Hair

Why Some Maine Coons Have Curly Belly Hair

ByKatrina Stewardson Posted on13/07/202513/07/2025
Bali a tabby Maine Coon cat laying upside down outside
5
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It’s not uncommon to notice that your Maine Coon’s belly fur is more curly or wavy compared to the rest of their coat.

This unusual feature usually appears on the neck, flanks, and underside – areas prone to curls, despite the breed’s signature long, straight guard hairs on the back and ruff.

There are two main reasons this curly fur appears:

1. Genetic Influence: Rex-Type Coats

Some Maine Coons may carry a mutated hair structure gene, also known as the “rex” gene. This rare genetic trait causes certain hairs to grow in loops or corkscrew patterns.

In cats that carry this gene, curly fur typically appears on softer undercoats, especially around the belly and neck.

While Rex mutations are more commonly seen in specific breeds, they occasionally surface in Maine Coons, creating a unique coat texture.

2. Humidity And Moisture Effects

Environmental factors also play a significant role in curly belly coats.

Maine Coons have a thick double coat comprised of a woolly underlayer and a water-resistant topcoat. When moisture, whether from humidity, rain, bathing, or self-grooming, affects areas like the belly and flanks, that undercoat may dry in gentle curls.

Where And Why Curls Occur There

Curly fur often appears in regions that experience friction or less frequent brushing, such as:

  • Underneath the belly
  • Along the inner thighs and groin
  • Behind the ears and under the neck ruff

These areas receive less grooming attention and are natural resting points on carpets or laps.

As a result, their fur can mat, curl, or take on interesting waves that differ from the straight hairs on their back.

Grooming Tips For Curly Belly Fur

Daily attention to curly fur keeps mats at bay and ensures comfort:

  1. Brush with care: Use an undercoat comb or rubber grooming glove to gently tease out curls without tugging.
  2. Frequent checks during summer: Warm weather can increase moisture. Brush the belly daily in humid climates to prevent tangles.
  3. Introduce grooming early: Let your kitten associate belly brushing with treats and praise. This positive experience makes grooming easier and more enjoyable for both of you.
  4. Focus on friction zones: Pay extra attention to the lower neckline, armpits, and groin; these spots often need gentle brushing each session.
  5. Apply gentle conditioning: Spritz a dual-suited conditioner (cat-safe formula diluted in water) in a spray bottle to ease tight tangles near the skin.

Comfort Tips For Your Cat

  • Use a soft grooming mat or towel as a backdrop; it makes the brushing process more comfortable and less slippery.
  • Keep sessions short and upbeat; otherwise, you risk stressing your cat, which can lead to negative associations with grooming over time.
  • Always reward with treats or play afterward. Positive reinforcement helps your cat perceive grooming as a pleasant and loving interaction.

How To Deal With Problem Mats

If curly fur clumps into mats, follow these steps:

  • Apply a cat-safe detangling spray to ease the knot.
  • Comb from the outside in, easing out tangles with a wide-tooth comb while holding at the skin to prevent pulling.
  • Cutting should be a last resort: Only use scissors if a mat is irreversibly tight and you’re confident in your trimming technique; never cut without pulling the hair away from the skin first. If unsure, consult a groomer.

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Author

  • Bali the Maine Coon cat and Katrina Stewardson. Female holding big cat!
    Katrina Stewardson

    A Maine Coon cat enthusiast with 13+ years of experience owning three Maine Coon cats. I have first-hand experience with many Maine Coon health issues, e.g., hip dysplasia, bent tail canal, and arthritis. I have experience in training Maine Coons, registered breeders, adopting Maine Coons, and caring for a Maine Coon. I currently own two male Maine Coon cats, named Mika and Bali.

    View all posts Director

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  • Breed Basics
    • What Is a Maine Coon? A Complete Beginner’s Guide To The Breed
    • Maine Coon Size & Growth: Height, Weight, Length & Development Stages
    • Maine Coon Personality: Temperament & Behavior Traits
    • Maine Coon Coat, Color & Pattern
    • Maine Coon Grooming: Coat Care, Bathing, Nails & More
    • Maine Coon Diet & Nutrition Guide: What To Feed & How Much
  • Maine Coon Care
    • Maine Coon Diet & Nutrition Guide: What To Feed, How Much, And Full Feeding Routine
    • Maine Coon Grooming Guide: Coat Care, Bathing, Nails & More
    • Maine Coon Litter Care: Trays, Litter, Training & Troubleshooting
    • Maine Coon Health & Wellness: Ultimate Owner’s Guide
  • Personality & Behavior
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    • Personality Traits
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