Daisy Bumstead?
I know the fact that that Terry, who played Toto in the Wizard of Oz, is one of the dogs in the spat outside the spa, is well-known.
But I think another female canine celebrity has a larger role in this film.
Mary Haines' dog, Sheba, sure looks like Daisy, from the Blondie movies, to me. Check it out.
The Women:
http://i.imgur.com/36hZZOG.jpg
Blondie films:
http://i.imgur.com/35zbE1T.jpg
http://i.imgur.com/wdKBd8T.jpg
This film is not on her credits here on IMDb:
http://www.imdb.com/name/nm1230870/