Zach Roloff ahead of their firstborn child's leg surgery.«I’m not prepared for that one,» Tori tells her husband of the surgery. «That one, I put out of my mind.»As she explains, the procedure involves putting plates on the growth plates of the then-4-year-old's legs to «hopefully slow down the growth and allow the bones to even out.» Like his dad, Jackson was born with achondroplasia, the most common type of short-limbed dwarfism. «Why is them always not straight?» Jackson asks, referring to his legs. While the procedure is meant to help the youngster, his mom expresses her anxiety about the surgery. «I'm a lot more nervous than you are. I have a lot more, like, worries,» she tells Zach.