If that mean Dog comes back I would call your Animal Control as he could just as easily bite a child as kill poor Lilac,
Thats just plain irresponsible to let a dangerous Dog like that loose, and I know that Dog is only following his nature but he shoulnt be loose like that.
Is there a way you can round these poor Kittens in so they are out of danger and out of the elements or put up a dog proof barricade?
I would worry about that Dog coming back all the time.
Its a long shot but if you call Iams , or Science Diet and ask for Kitten Food Coupons they might help.
I bet if you sent this thread to them, they would contribute something.
The Awesome Momma Angels Army is there , and are trying to teach those Little Cats of the Future to be careful and to listen to you carefully as you have their best interests at heart.
God Bless You for caring.