1. Hungry feeding: Knife carvings are a kind of lines on the carapace of grass turtles, which are all turned once a year, also known as growth lines. If you want to raise knife lines, you should pay attention when feeding. You can't feed too much food to grass turtles at ordinary times, otherwise they will grow too fast and the lines on their carapace will not be obvious. Usually, you can feed normally for one month, then stop for another week, and so on. The purpose of doing this is to make them fully absorb the nutrients in their bodies.

2, normal hibernation: If breeders want to raise knife carvings, it is best to let them hibernate normally. Many wild grass turtles have obvious knife carvings, because their living environment changes according to the seasons, and most of the artificially raised grass turtles live in a stable environment. In order to speed up their lives, some breeders will reduce their hibernation time or even not hibernate, so they don't have much time to transfer nutrients from their bodies to their carapace.

3. Get more sunshine: If you want to raise knife lines, a lot of sunshine is essential. Breeders need to build a balcony for them, so that they can climb up and bask in the sun anytime and anywhere.

The knife carving of grass turtle is inherited, but whether it can grow into a knife carving is not closely related to genes. Whether grass turtles can grow knife carvings has a lot to do with the breeding the day after tomorrow. Therefore, if breeders want to raise knife carving lines, they must carefully breed them.