Concerned about my pigs

[Oreo&Reese]

Hey guys. So I’ve had my two pigs Oreo and Reese since March and I still have questions every once in a while. They love to jump on top of small boxes I have for them. There’s also a low platform in their cage that they’ll jump on and off of instead of using the ramp. I know they have delicate spines. Will this hurt them over time? They never seem phased when they jump.
Thanks !

 

[Swissgreys]

Jumps from a low(ish) height are fine as long as they are making the decision to jump and not leaping off of something out of fear.
I also have platforms and houses in my cage that my piggies love laying on, and happily jump off and on multiple times a day.

 

[Piggies&buns]

One of two piggies likes to jump on top of his hidey houses.