Teeth problems - overgrowth
The incisors, premolars, and molars (cheek teeth) of guinea pigs grow throughout life. Guinea pigs do not have any canine teeth and have 20 teeth in total. The normal length is maintained by the wearing action of the opposing teeth. Malocclusion is one of the most common inherited diseases in guinea pigs and leads to overgrowth of incisors, premolars and molars, with resultant difficulty in eating and drinking and associated pain.