Hi there, my 4 weeks old bullmastiff is refusing to eat and drink. I put some glucose into the water and he is still not having it. This is freaking me out. He was fine this morning and the last time he ate was 12pm this afternoon. I feed him with pedigree in can for puppy for the past few days and he was delighted with his meal. Suddenly, he just dont eat and dont drink!! Help! What is going on with him? Can anyone share some experince or advise please?