thunderingelephants -
Just a thought, since you're hesitant about sending them out -
Is it possible that in some of your stories, you could simply name the characters, and leave it up to an editor to decide if they should be children or dogs or armadillos...?
If the stories are to be illustrated, it might not be necessary to mention what the characters are - that will be apparent from the pictures. For instance, in stories like Bedtime for Frances, Toot and Puddle, and Owen, there's no mention in the text as to what sort of creatures they are. In fact, I read one description that referred to Frances as a skunk, and I've always known her as a badger! I guess that's an example where it doesn't really matter.
On the other hand, I heard an editor give a talk and someone asked her if she considered talking animal stories. Her response: Of course! This is children's books!