Daisy is an excited barker and I am afraid all I can use is distraction, either chews, kongs or teach them find it. So I say "where is your ball daisy, find it!" And she runs off to look for it and gives my five minutes peace!! Or you could do the teaching them to speak command and then the ssshhhh command. Never managed it myself but it's in the books as a way of controlling excitable barking.
Good luck