I think my dragon has tail rot

[Silver dragons]

So normally my smaller bearded dragon is a grayish normal-looking color and today I went and introduced her to my larger dragon. And she turns a bright orange color I didn't even know she could do, but her tail never changed the orange color like she did. Does she have tail rot? She did previously have very minor tail rot from her previous owner but I treated her for it.

 

[Silver dragons]

Here is a picture of what she normally looks like, as you can see her tail looks a lot more normal