It could be. That part might just fall off but there could be an infection creeping up under the scales. You can soak it in a betadine water mix and apply Neosporin but if it travels up even slightly you will need a reptile vet to have a look. They might give it a quick snip to get the bad part off + stop spread of infection. If it comes to that it's not a big deal , amputation of such a small area of the tail doesn't affect the dragon much at all.
It could be. That part might just fall off but there could be an infection creeping up under the scales. You can soak it in a betadine water mix and apply Neosporin but if it travels up even slightly you will need a reptile vet to have a look. They might give it a quick snip to get the bad part off + stop spread of infection. If it comes to that it's not a big deal , amputation of such a small area of the tail doesn't affect the dragon much at all.
Not necessarily, there can be quite a bit of variation in what their poo looks like. Even if it looks " textbook " they can have parasites so unless there are other indicators like weight loss + lack of appetite and a clear pattern of off looking poo's then I wouldn't worry.
Sometimes their poop can look messy like that from temporary digestion issues and it's nothing to worry about. If it continues like that for several weeks, it's probably worth having a vet check a sample for parasites and treat as needed. As long as there is no weight loss or lack of appetite as mentioned, it's not likely something to worry about much.