Yesterday was my first day back to work and my son who is 11 weeks and my 2.5 year old daughter went to a sitter.  She watched my daughter as a baby and I trust her and know she does a good job.  When I picked them up yesterday she mentioned that Matthew didn't nap much, just cat naps and told me she had only fed him twice that day. He is breastfed but I pump and he takes bottles.