Because their skulls can collapse allowing them into smaller places, they can chew through anything (even your pipes then swim up your toilet), they can survive falls from great heights, their fleas carry diseases like the black plague, they're prone to cancer, and will eat everything including each other to stay alive

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The black plague.

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the plague

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They do make good pets. I had one in high school.

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could it have been ...wait....THE BLACK PLAGUE

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that's what i was gonna say

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The plague was caused by fleas actually. The fleas were on the rats but it was the flea itself that caused it.

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And the infestation of rats that conveyed it. And now we will make a little song....and they all fell down

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Starrose, you are correct it was the fleas

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And my dear friend did these fleas have bus fare nope...point of conveyance the rodent mainly ...Rats

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They brought the plague.. >.>

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