i have a four month old yellow lab. puppy.at the moment he has a beautiful black noe but i have noticed most adult labs have pinker noses. is there any reason for this and is there any chance off it staying black?

With a little bit of luck guest. Labradors noses do tend to get a slight brownish tinge to them as they get older although some hold the pigmentation very well. (Although rarely as good as the blacks) Some get "Winter Noses" where the pigmentation seems to fade a little during the winter and return in the spring!

Regards, John