I have an 8 week old pup (im the breeder) when he was 5 weeks old he had a bout of sickness , he shook his head an lots of milky fluid came out then he was very quiet.iItook him to the vet and he gave him an anti sickness jab some anti biotics and some pro soluble.The other two puppies got the same thing .The boy still gets tummy ache he goes very quiet and just wants a cuddle.He is on hills science puppy ,does not have diarreh and seems fit and lively inbetween.Do  you think its irritable bowel syndrmone.Any other advice