Cage Side Height

[mgswart]

I'm wondering, how high do the sides of an open top cage need to be so that the piggies won't try to get out?

 

[dagwellismypigy]

Just one grid(14 inches) is high enough. Unless you have a split cage with boys on one side and girls on the other, then you would want a little roof. Generally when the pigs have so much room in the cage they really don't want to get out.