Rat Snake Question

[Norvakdragon]

Not sure where else to post this, so here goes.

Not too long ago, I got an Albino Texas Rat Snake. She's already about 4 years old. Recently, within the past few weeks, she's shed.

Now, I don't know if this is related, but I'm curious. She's a little over 4 feet long and the last four or so inches of her tail have taken on a pink color and the scales there seem a bit rougher than anywhere else. Her underside has a thin pink line from the end of her tail up to where the oddities in her tail begin. She doesn't seem to have lost any movement in her tail, as we had her on the bed and she was moving it just fine. She also seems perfectly energetic and curious as always. She's been trying to burrow a lot in her enclosure, though, which is strange.

Any ideas?

It's got me a a bit concerned to say the least.