Your veterinarian may have noted that your dog or puppy is showing signs of concerning behavior that needs to be addressed right away so you will have a successful friendship. (diamondsintheruff.com)
The vet is an important partner as your dog ages; s / he will help watch for signs of concern. (spotmagazine.net)
Other signs of concern include lethargy, persistent vomiting, large amounts of blood in the stool and a fever. (dogcare.dailypuppy.com)