Help!

[jomad1000]

I am looking at adopting a 4th pig. My cage is 2 grids by 5 grids with a loft level which is 2 grids by 3 grids. Would this be ok for 4 piggies or will I need to make it larger?

I can not extend it longer or wider so would need to put in a third floor. I need to sort this out before I organise a home visit.

Thanks