Just like any other organism, Plotties can get hurt. Luckily, if a Plottie is healthy it can regenerate itself. Regeneration can go from closing up a small cut and scarring to completely regrowing a limb.
Depending on the Plottie's health and age regeneration times may vary. On average, a healthy Plottie could potentially regrow a limb in within a 2-3 week timeframe.
Due to their generally quick recovery, Plotties rarely have the need for prosthetics or mobility aids but they may be needed if the Plottie is unable to regenerate itself, if it's infected or if it was born without the limb.