Bigger boxes sound like a good plan. I know I ended up at Target and Walmart and bought those large under the bed storage boxes to use as litter boxes. They were cheaper than anything at the petstore, and even came with lids, which I had no use for, lol, but just put a few of the lids under the boxes to catch excess litter etc...

Glad to hear Ziggy's eye is getting better!! Keep us updated!