Overgrown nails
Overgrown nails start spiralling up and around like the end of a corkscrew. When the guinea pig puts weight on the nail, the weight encourages the nail to become pushed outwards and into a spiral. This is why guinea pigs must always have their nails trimmed on a regular basis. If they are left untrimmed, overgrown nails will cause the guinea pig difficulty and discomfort when walking. Please see my guide to nail clipping to help you keep their nails in top condition.