I have a cactus, not sure of the name. It is a fairly common on to see in the stores, I am going to attach some pics. I have had this cactus for a couple of years now. It is the only surviver from a pot of mixed cacti. The other plants in the pot had gotten infested with mealy bugs and I couldn't save them. I do forget to water this plant sometimes. It has gone for long periods of time with out water. The plant is in my bearded dragons cage. The cage is hot and dry and cacti and succulents do really well in there, I have even had some flower in a matter of weeks after putting them in. But if the plant is not spinned it will either get clawed up or eaten. So anyway this plants base looks a little shriveled. I don't know if it is dieing. If it is can I cut off above the shriveled area to healthy growth and save this plant? Any help or advice is greatly welcome. The first pic is close up of the base of the plant, second is overall plant and third is overall of the cage, you can see Stubbs, my bearded dragon in the front. He is waiting for his morning veggies.