We have a 15mnth old CKCS.  The last 2 mornings he has sicked up frothy bile, but with no food content. We have fed him on Pedigree complete but because his poo was always soft and regular, we changed him to Top Dog Supreme chicken and rice, as recommened by someone also owning a CKCS  This tightend up the poo, but he finds it uninteresting. Any ideas ?
Pete and Janet

If it's first thing before his breakfast, it's probably because his stomach's been empty for too long. This happens with my dogs if I have an early night and their bedtime biscuit has been digested. I find a biscuit at 11pm usually sees them through safely till breakfast at 8am.

This happens with one of my GSDs and like you, I give a biscuit before bedtime and one once she's been out in the garden at 5.30 am to tie her over until feeding.  This seems to have solved the problem.

I think you need to register it is free and I think people will need to ask questions in order to help you effectively.
Are you feeding twice a day?  I have found that smaller dogs do better on this regime and this kind of morning chucking is often due to a very empty tummy in the mornings, particularly if the dog is eating lightly due to not enjoying it.
There are so many foods it is often a case of trial and error finding one they enjoy more I'm afraid.