Ogden & Keevallik have published an analysis of the difficulties involved in applying conversation analytic and phonetic tools to human-animal interaction, in Language & Communication.
In encounters between humans and animals, both parties make use of sound, some of which are vocal. Since the anatomy of vocal tracts is different in different species, the production of sounds varies, while humans find ways to partially match the acoustics of animal sounds. Analytic challenges lie in the representation of the various sounds, as we need to move beyond the IPA, and in establishing when and how animals become participants in interspecies interaction.
Non-lexical vocalizations 