As death approaches

In a moment of morbidness, I googled for "Signs that a dog is dying". He has been showing many of the symptoms including:

1. Slowing down

2. Sleeping more

3. Not wanting to eat much, then not wanting to eat at all

4. Staying in one spot drowsing, not active.

5. As death approaches, extremities get chilly. I noticed he has been shivering/shaking quite a lot

6. Restless spells, confusion, 'seeing things.'

:( I'm scared.