Black fur turning brown in some parts. Ideas? Suggestions?

[bellinisurge]

My nearly 7 year old always healthy indoor tuxie has a brownish tinge to her fur on her front paws. Google tells me possible tyrosine deficiency. Her normal diet is Purina hypoallergenic kibble.
Any ideas? Suggestions.

My black cat looks dark brown tabby in the sun with his summer coat - was yours like this last summer?

Our cat is still young but we notice her coat changing colour in the summer. I thought this was normal.

My vanta black rabbit turns brownish in the summer too

Sharpie?

I also have seen colour changes in the summer especially as they age.

I have three black cats. All have brown highlights (Basil more than the others) No evidence of any dietary deficiencies as conformed by our vet.

Thanks everyone. I'll just leave her looking beautiful with the food she has.
I never really saw it on her before.

My black Persian also goes brow in the sun. Either that or she's gone rusty.

My black cat goes brown in the summer. It freaked us out the first year, as our previous cat (black and white, but mainly black) didn't change at all, but this is really noticeable, especially in the sunlight.

And obviously if any of you wish to include pictures of your beautiful black and tuxie cats that would be most welcome.

Ours have vague shades of chocolate brown if they're in certain lights , more so now , they're shedding out the winter fur .
In Summer they are sleek panthers with a sheen like a magpie's wing ( they tell me)
They'e 4 now so this'll be the thrd Summer with us

Absolute unit of a rusty black cat here.

Absolute unit of a rusty black cat here.

That's absolutely normal in black cats (dogs too, I'd imagine). I've had cats for 41 years, 5 of them black, and they all looked like that.

And here's the actual picture.

Our Black cat is actually a black smoke and goes very brown in the summer.

Lucyfur also has a brown ish hint more noticeable both as she gets older and in warmer weather. She’s 13 , no health/ dietary issues 🤞