The most common health problem seen in guinea pigs are colds that result from drafts, dampness or temperature fluctuations. While we don't think of colds as being too serious, Piggy's cold can quickly develop into pneumonia, so it's important to have him examined by your veterinarian as soon as you notice signs of illness. Also, if your pet stops eating, have him seen immediately by the veterinarian, as this can be life-threatening. To keep your guinea pig as healthy as can be, take time every day to examine him for lumps, cuts, fleas, ticks or lice. If Piggy displays a hunched or huddled posture, he could be injured or sick.
Guinea pigs are prone to abscesses under their chins, too, where their lymph nodes are.
Other common signs of illness include diarrhea, weight loss or excessive weight gain, inactivity, not going to the bathroom, nasal or eye discharge, hair loss, incoordination, or limping. If you notice any of these signs, make an appointment with your veterinarian right away to get your friend back on the road to good health. When handling your guinea pig, be sure to pick him up carefully to avoid injury or discomfort. Use one hand to support him under the chest, and the other hand to support him under the hindquarters. Never grab him over his back, as doing so can inhibit his breathing.