Yes they do and they posion in them !
To protect themselfs from enemies.
Hedgehogs have about 5,000 to 7,000 quills.
no, normally it won't hurt
prickles is in the potties
Yes it can if you scared it
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Thorns
Well no, but in Sonic X he got hurt multiple times
porcupine
Protecting themselves.
purple
prickles adhere to animals as a mode of transportation seeds like to move and grow up in different places.