Charlotte's arrival did not change that much, just the choice of locale: When the baby nurses, Penny comes over and joins at the bottom of mommy's feet. When Charlotte is on her play mat, Penny lounges right next to her. When Charlotte is in her crib, Penny squeezes underneath.
In a dog's life, there is a big soft spot for a new baby sister it seems - and apparently no worry about 500 hours less sleep!
