The vet may also point out other signs to you such as bluish coloring of the gum or swelling especially of the abdomen. (uvma.org)
In addition, currently used antimicrobial rinses can change the color of the gums and alter taste, so people are less likely to use them for as long as they should. (sciencedaily.com)
Physical exam findings note such things as heart rate and the quality of the heart sounds, respiration rate, the feel of the pulses, lymph nodes, abdomen, and even checking the color of the gums. (healthypawspetinsurance.com)