10/13/2026
🐈⬛ EDUCATIONAL CORNER: RUFISM !! What it is ? Why Do Some Black Maine C**ns Turn Reddish-Brown?
LET’S TALK Rufism !! Since many are missing the point of the “chocolate” post which is NOT does this kitten have rufism - it is breeders marketing mainecoons cats in colors they are not , misleading folks, and calling it a rare new color , when it is NOT
Have you ever noticed a beautiful, jet-black Maine C**n developing reddish, rusty, or copper-colored tones in its coat?
This is commonly referred to as coat rusting, and what many people don’t realize is that it can be caused by nutrition, sun exposure, and other environmental factors rather than genetics.
🐾 1. TYROSINE & PHENYLALANINE — THE NUTRITION CONNECTION
One of the most fascinating causes of coat rusting involves two essential amino acids: phenylalanine and tyrosine.
These nutrients are necessary for producing eumelanin, the pigment responsible for a cat’s rich black coat.
Scientific studies have demonstrated that when black cats receive insufficient amounts of these amino acids to maintain optimal pigmentation, their beautiful black fur can gradually develop reddish-brown tones.
Interestingly, a cat may receive enough of these nutrients for normal growth and still not receive enough to maintain its deepest black pigmentation!
☀️ 2. SUN BLEACHING — YES, BLACK CATS CAN FADE!
Just like human hair, black cat fur can lighten with prolonged exposure to sunlight.
UV rays gradually affect pigmentation in the hair shaft, producing rusty, reddish, or brownish highlights.
This is especially noticeable on areas frequently exposed to sunlight, such as the back, shoulders, and tail.
🐾 3. OVERALL HEALTH & NUTRITION
A cat’s coat can tell us quite a bit about its overall condition.
Poorly balanced nutrition, inadequate nutrient absorption, or certain underlying health concerns can affect coat quality and pigmentation.
However, a rusty coat alone does not mean a cat is unhealthy or has a nutritional deficiency.
🐈⬛ 4. CAN BLACK FUR RETURN TO ITS DEEP BLACK COLOR?
Absolutely, depending on the cause!
When nutritional deficiencies are identified and corrected, newly growing fur may return to its original rich black pigmentation.
Sun-bleached fur may also be replaced by darker fur during the natural shedding and regrowth cycle.
Existing faded hair doesn’t simply turn black again overnight.
❤️ THE TAKEAWAY
Not every reddish or brownish tint in a black Maine C**n is a genetic color issue!
Sometimes the explanation is as simple as sunlight, nutrition, or normal coat changes.
Before assuming a cat’s coat color has genetically changed, consider the environmental and nutritional factors that influence pigmentation.
A genetically black cat can still experience coat rusting without any change to its underlying coat-color genetics.
🐾 Jaycee’s Maine C**n Cattery
Photo is ai generated to show what real rufism looks like - it does not turn a kitten chocolate brown 🤷♀️🤷♀️
Dedicated to education, responsible breeding, and the health of this magnificent breed.
