The kidney is "designed" to 1) not leak proteins and 2) to reabsorb any that do get into the urine.
Usually concentrated because of dehydration
It is sometimes normal if they have been pregnant for a while.
Could possbly be an infection, see a Dr.
jerry springer host a t.v show called jerry springer.
I don't know about a pregnant dog, but urine leakage is a sign of diabetes, get a bottle of diastix glucose test strips and test her urine.
Chas Springer's birth name is Charles Harold Springer.
Jerry Springer's birth name is Gerald Norman Springer.
Jesse Springer's birth name is Jesse Charles Springer.
Russ Springer's birth name is Russell Paul Springer.
Axel Springer's birth name is Axel Csar Springer.
Springer Horrill's birth name is David Springer Horrill.