Thank you so much for your answer. I started to panic a little bit when I had first noticed the color. But the tortoise seem to be doing really well and we have noticed some pink-red color also on the top of her shell.
Today, when giving a bath to my 5 years old female Western Hermann's, I have noticed strong pink all over the bottom of her shell. She had a longer space in between baths than usually, so I don't know when exactly it started. She is active as usual, eats well, poops every day. Does anyone has...