The role of a pet owner is similar to that of a parent. Much like babies tell you when they need you by crying and changing their behaviors in some way, dogs also communicate through such means. More than anything else, dogs tend to be creatures of habit. This means that they need you to pay close attention to what they are doing. If any of their behaviors are breaking the habit of their daily routine, there is a good chance that something is not quite right with them and that you might need to help them out in some way.
One of the many behavioral changes that could indicate that your dog needs you to help them by taking them to the vet is if your dog is refusing food. If there is one thing that pretty much all dog owners out there can agree on, it’s that dogs love to eat. In fact, you would be hard pressed to find a single other thing that dogs love to do quite as much as they love to eat food, which is why they tend to get very excited whenever a plate of food is placed before them.
If your dog is not showing this same level of excitement, there is a good chance that it is suffering from some kind of illness. Check out what CKCUSA has to say about the matter. This organization is the single most important resource that a breeder can have, and it leads to a lot of different angles that you can explore if you feel like you have exhausted all of your other options. Any responsible pet owner knows that the more information you have on such matters, the more prepared you will be.