The AnimalBehaviours module of the framework has some comp classes that can be added to hediffs to provide special behaviours:

• Hediffs that copy comp class functionality: These hediffs apply the same functionality as one of our comp classes, so you can add animal behaviours through implants, diseases, etc
• Turn When Dead: When this animal dies, it will turn into another
• Resurrect: When this animal dies, it will resurrect a configurable amount of times

They are all comp classes, so you just add them in XML in the <comps> tag of an appropiate hediff. Check any of the examples to see.