Red line on bottom of shell

[Buff wiggins]

Hello all I was hoping you could help me put my wife's mind at ease about this red line she noticed on our sulcatas shell today. I am guessing it is a growth line? I did recently get a heated pad in his house outside that I have set at 85 with a thermostat and have been checking it twice a day to ensure everything is working properly. He seems a lot happier with it and it only takes up a 10th of his outdoor enclosure so he can walk right off of it anytime he wants to. Thanks for your help.

 

[G-stars]

That's just new growth. Nothing to worry about.

 

[Big Ol Tortoise]

Might be his egg yolk.

 

[cmacusa3]

Might be his egg yolk.

It's new growth.

 

[Big Ol Tortoise]

It's new growth.

Yeah probably, I think his tort is a bit older and wouldn't have it