Sorry it has taken me a while to reply to your guesses!

He is your friend, your partner, your defender, your do-. You are his life, his lo-e, his leader. He will -e yours, faithful and true, to the last -eat of his heart. You owe it to hi- to worthy of su-h de-otion. ~ Unknown

Letters left to guess:
B C G J K M Q V X Z

Score:
3-greys-and-a-mutt: 20(E)+ 19(O)+ 14(R)=92
ShepherdLover: 10(U)+ 8(Y)+ 8(N)+ 8(S)+ 7(D)+ 1(K)=52
Karen: 8(A)+ 13(T)=29
Rottie: 12(I)=24
delidog: 7(L)+ 7(F)+ 1(P)=15
DixieLand Dancer: 12(H)=12
Megan of Dixie Belledom: 4(W)=4