Hedgehogs havespikes [quills] because in the wild they use it to protect themselves. Hedgehogs do not have sharp as quills as porcupines. They have softer, blunter quills. Hedgehogs shed their quills when they become older.
If you are reffering to its pokey, porcupine like back: they rub mucus in their fur to collect twigs and stuff (don't ask me why), and that makes their fur spiky.
If you are referring to its backbone: Then it is because they are Mammals and all mammals have a skeletal system or Bones.
Spikes are a hedgehogs natural protection from predators.
For protecting them when in danger or feels that its being harmed
It is for protection against other animals.
For protection from enemies and to scare off predators.
for protection from predetors
spikes
its spikes
Quills.
A normal adult hedgehog has 5,000 to 7,000 quills.
No, no it will not. Wow.
A hedgehog is a small animal that protects itself by hiding its head and spikes covers entirely its whole body.
Hedgehog or porcupine.
spikes
at age around 6 months.
to protect themslfe
Hedgehog spikes really aren't as sharp as they look. They can be prickly at the ends and if you randomly touch it, but if it's a tame hedgehog, the quills will lay themselves down, so it won't hurt to pet or pick up a hedgehog.
it sys that the hedgehog is a mammal with sharp thorn like spikes but mammal and thorns don't work