There are 5 S's, 2 F's, and 1 K.

Life is like a dog sled -ea-. If -ou ain'- -he lead dog,
-he s-ene-- ne-e- -hanges. -- Le-is G-i--a-d

Letters available:
B C J M P Q R T V W X Y Z

Score:
Karen E(13) = 26
-*BaSim*- A(6) + I(7) + H(3) + L(5) + F() = 34
**Rottieluver** O(3) + U(1) = 8
Daisy's Mom D(5) + S() = 5
ShepherdLover G(4) + K() = 4
zippy-kat N(4) = 4