Our dog managed to open his large metal cage and escape no matter how hard we tried. We blocked it with furniture and everything! In the end, she tore the bars and even injured herself while escaping. We bought these zip ties to reinforce the cage and voila! No more cage locks and no more escapes. These zippers are tied so tightly that she doesn't realize she's holding onto them with her teeth. Very easy to use. I haven't tried cutting them off so I don't know how difficult it would be.
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