Thank you to everyone for your thoughtful replies!

I will definitely hang in there and have Phoebe's brush (Chris Christenson) on the coffee table so that I will brush her every evening. I take it from the many similar stories that this must be a terrier thing... my Cavaliers love to be brushed and go to sleep when I'm trimming their nails!! I'll take a look at the brush that was recommended also. We are loving our Phoebe and cannot believe how very smart she is... nothing gets by her and she has my Rosie playing again.
Thanks again for the helpful suggestions