I cannot say what it is it sound alot like what my last dog was having have you seen the site
MVDincavaliers Mitral Valve disease in cavaliers
I cannot do the link thing but they might be able to answers question or give advice
If I should not put this here will some one remove it please
----Aileen and the gang(Jazzie --Barney--Sam)
cavaliers at the bridge Mattie and Rocky & Sam & Jake
Better to light a candle for one lost dog than to curse the darkness of man's indifference. Saving just one dog won't change the world but it surely will change the world for that one dog.