Blue vein cheese

My cat just licked some blue vein cheese. Only a very small amount but I heard it isn't good for them - can it do any harm? He only took like 5 mm amount.

My friend's VERY large orange male tabby, appropriately named "Lunchbox," ate some not too long ago and was fine.  He did have a days' worth of FEROCIOUSLY ODIFEROUS bowel movements though so prepare yourself.

The blue cheeses have penicillin type mold that grows on old food like bread and blue vein too. It can cause major issues like seizures that's why I am worried but I heard some peoples cats were ok eating it
roquefortine It's called

I have been searching about roquefortine c and pets and am seeing that dogs are very sensitive to it and should not eat blue cheeses.  I can imagine a dog would probably take a big gulp of the cheese too and have ingested more roquefortine c. than just a small amount like 5mm.   From all I've read, roquefortine c poisoning can be very possible for dogs but extremely rare for cats.   You could always call your vet and ask if they ever heard of this danger in cats, but I think such a small bit with your cat is nothing to worry about.   I know, it is hard not to worry, my Speedy will take a lick of something I'm eating and I worry that maybe it had onion flavoring or garlic, but I think a lick would not cause any problems.

I am not going to worry and call the vet becuse I also though it is a small amount but just in case wondering if such small amount may cause some problems? He is fine so far.

Same with garlic and onion our vet said that they had to eat them every day to produce effect

That is not true, garlic and onion toxicity can cause hemolytic anemia with even one small ingestion, depending on the cat and situation.

@Anni7, how is your guy doing today?  I was not aware of this roquefortine c until I read your question and then looked to find more information.  A lot of people might immediately think of lactose-intolerance when they hear blue-vein cheese, but that is not the issue here, it is what you said, the roquefortine c., I guess it is used to ferment the cheese?  I don't know if I'm correct in saying that animals metabolize and make by-products of the metabolism different from humans?

I never hear dog owners mention about the blue-vein cheese and I wonder how many people are aware of the toxicity of blue-vein cheese.   I will be looking to see if there is more discussion in this thread on the question and I will also be keeping my eyes open for more information.

I am glad that your kitty is doing well when you last posted.