I'd be tempted to ditch the cage. I've never actually used one. I don't have a problem with them, just never thought about it but the dogs we've had showed their chewing tendencies early on.
I had one who was a chewer right from the start. She ripped beds to pieces, destroyed shoes and handbags, chewed chunks out of walls etc. despite having many, many toys and bones to entertain her. Even now, at the age of 12, she chewed open one of the puppy's toys and pulled all the stuffing out.
The second dog never chewed anything she wasn't supposed to, except one night I forgot I'd left some treats in a coat pocket and she nibbled a tiny hole and ate the treats.
The third dog was a rescue Golden Retriever who, amongst the many problems that led to his needing a new home, had eaten their kitchen!!! He was 6 months old when we got him and had been locked in a garden shed every day because he was such a dreadful chewer that they wouldn't have him in the house. I didn't leave him alone, unsupervised, at any point and he never chewed anything bad. He did love bones and toys and would steal things to bring to you when he was excited but handed them over unchewed so I suspect that a lot of his problem was boredom and separation anxiety.
Pupiranha is very much a chewer so she gets confined to the Utility Room over night and when we have to go out. She gets a stuffed Kong and amuses herself shredding the puppy pads. No doubt she will discover that beds and duvets have fluff inside them before long!!!