Off food, unusual behavior (hiding, urinating, etc), "mopey" disposition, no desire to go out/roaming, difficulty in holding their heads up, overly "needy", overly floppy/malleable when being handled, slow response when pushing blood from gums, overly dry/wet nose, sunken eyes, splitting nails, disinterest in playing, ears not moving very much to stimulous, etc...
Off food, unusual behavior (hiding, urinating, etc), "mopey" disposition, no desire to go out/roaming, difficulty in holding their heads up, overly "needy", overly floppy/malleable when being handled, slow response when pushing blood from gums, overly dry/wet nose, sunken eyes, splitting nails, disinterest in playing, ears not moving very much to stimulous, etc...