Like Cheryl said... a beardie's appendages are more susceptible to injuries, retained sheds, etc...
Without knowing what exactly has happened to your beardie's tail, there is no way we can tell you why it has dried up.
You mentioned having two beardies housed together. Is it possible the other beardie may have bitten the one with the affected tail? If this is a possibility, you may want to separate them.
Retained shed on the tail may have caused this as well... cutting off the blood flow as mentioned.
Just keep a close eye on it to make sure infection does not set in. Using the Betadine mixed with some water(resembling that of weak tea) and soaking her tail will help, as it is an antiseptic. The Neosporin will help with any infection that may have started or to stave off infection.
I hope your beardie is doing okay. Keep us updated.
lauraj1055 wrote:I have a question on keep dragons hydrated... Is a bath 3 x a week good enough for a 8 month and 1 year old? I never see them drink from the bath... should I syringe feed them water? Or are the baths good enough?
Bathing 3 x a week is good. Generally this is all that is needed for hydration, along with the greens, which also provide moisture. Beardies absorb moisture through their vent, this is why bathing is so important. While bathing is usually enough, there are instances when this is not enough and you may need to orally hydrate them. You can usually tell if your beardie is not getting adequate amounts of water. Their skin will start to wrinkle badly and may even pull or sag away from the body. Their fatpads on the head may look sunken in. They may become lethargic. Just some of the things to look out for.