Why does your 3 yr old red eared slider have creases in its shell?

Creases in a red-eared slider's shell, especially in a young turtle, can indicate growth issues, often linked to improper diet or environmental conditions. If the turtle is not receiving adequate calcium or UVB light, it may lead to shell deformities. Additionally, rapid growth due to overfeeding can also cause uneven shell development. It's essential to ensure a balanced diet and proper habitat conditions to promote healthy shell growth.