Ahh, ok. Well there isn’t anything wrong with crating – especially when it comes to your dog’s safety. It’s better to have them safe and confined, than free ranging and ingest something harmful or foreign.
I can’t really give proper advice without knowing your pups. A trainer would be your best bet if you want to have them free roam. I know stories of dogs left alone together, that have lived together for years, but end up getting into lethal fights while their owner was away. Not to mention how they could behave with outdoor access unsupervised. If they have such destructive personalities linked to separation anxiety, crating is probably your best option.
Sorry I couldn’t be a better help!