Cantaloupe, Honeydew and Melon were part of the big Critter Corral rescue of 60+ piggies from a hoarder house back in March.  Honeydew and Melon are young sisters and Cantaloupe is likely their mom.
  Honeydew and Melon get along great, Cantaloupe usually does too but gets a little annoyed with the little ones sometimes, so these ladies need plenty of hideys and room.  Cantaloupe can't be separated out because she's even less tolerant of other pigs than she is of the kids. She's just a boss lady who wants her space.