There are 9 E's, 9 A's, 13 O's, 6 I's, 7 S's, 6 D's, 4 G's, 3 M's, 2 W's.

-es-e-da- I was a dog. -oda- I'm a dog. -omo--ow I'-- --o-a--- s-i-- -e a dog.
Sig-! --e-e's so -i---e -o-e -o- ad-a--eme--. ~ S-oo--

Letters left to guess:
B C F H J K L N P Q R T V X Y Z

Score:
ShepherdLover E(9) + D(6) + W(2) = 26
Karen A(9) = 18
petspoil O(13) + G(4) = 30
**Rottieluver** I(6) = 12
delidog S(7) + M(3) = 10