Hi Folks, I've had a read through some of the previous posts on here and I think I may have sussed out what is going on with my cactus already but I just want to double check with people who are more clued up on the matter. I am a relative new comer to the world of Cacti and have been buying quite a few recently. One of my most recent aquisitions (who I shall name Boris as I'm unsure what genus it is) is a little like rabbits ears in appearance and has small (almost fluff-like), white needles. I'm not sure if Boris is Opuntia. Boris is currently about 3 inches tall and has 4 sections (ears), so I'm assuming not very old. When new there was an extra section which I very cleverly knocked off. Since then the rooted part of Boris has turned from its original, nice green colour to a greyish, almost mouldy-looking colour. The rest of the plant appears quite healthy. The discolored section is not squishy and the soil has been kept dry. Is this normal? I notice that in other threads it is mentioned that Cacti look more woody toward the base with age and this kind of fits the bill but Boris is still a youngster. Should I be worried about its health or has my question been answered already in the previous threads?