Spirit animal

Sugar has it all figured out!

Good horse.

Cuddly horse? Mayhap? Is horse asking for cuddle time? Can I pet the dog?

I think horse sleep standing up?

Only sometimes; they still need to lie down for REM sleep.
- 10 REM
  20 sleep
  30 GOTO 10
Yeah this is probably unhealthy.
Also humans care for horses. Same with any animal that has been domesticated over the last 10,000 years. It sucks, but without us they might have a difficult time.
- Its perfectly healthy.
  Aside from a deeper sleep, horses will lay down for a lot of reasons. The important part to note is horses are prey animals, so they have evolved to do a lot while upright. Laying down is actually a big sign of feeling safe, and something they may do in fields with other horses they get along with, in a stall if the bedding feels good to them and there is enough room, etc.
  The problems are when they are unwilling or unable to get up, that can be a sign of anything from an injury to sickness or a neurological issue.
  My wife is the knowledgeable one, this is just s bit of what ive picked up.l
  Edit: wife says if the description is accurate, just a silly horse being silly, and since Sugar looks well cared for..... yeah just a silly horse doing silly horse things.
- Horses do really well without humans.
  BLM estimates there are around 33338 wild horses in Nevada alone.