An outside cage which is cat proof?

[SW <3 Guineas]

I have been contemplating to build a c&c cage outside. I had a quick browse to see if anyone had a c&c cage which was safe outside but had no luck. I have an enclosed backyard with a patio, the only animals which visit my backyard are doves and cats. I already have a aluminium cage (70cm x 170cm) but I'd like to include another so my piggies have more room. I only leave my piggies outside during the day and I keep them in smaller cages during the night. Does anyone have any ideas on the cage I am contemplating? Is it safe? Is it ok to cat proof it as suggested on the main site or should another method be undertaken if it will be used outside?

[Percy's Mom]

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