Dental disease in pet rats and mice (continually erupting incisors; overgrown incisors most common)
Source: Merck Veterinary Manual (merckvetmanual.com), a copyrighted professional veterinary reference. Per COPYRIGHT_POLICY §3, the points below are paraphrased derived fact summaries: numerical values and proper nouns are preserved from the source, but sentences are rewritten and not quoted verbatim.
Claims
*[Paraphrased derived summary — non-Open-Access source.]* Pet rats and mice commonly develop dental problems because their incisors grow continuously; overgrown incisors are the usual issue (unlike guinea pigs and chinchillas, where cheek-tooth malocclusion is more common).