/Defs/ThinkTreeDef[defName="Animal"]/thinkRoot/subNodes/li[@Class="ThinkNode_Subtree" and treeDef="SatisfyBasicNeeds"] Append

SatisfyingNeeds

/Defs/ThinkTreeDef[defName="Animal"]/thinkRoot/subNodes/li[@Class="ThinkNode_ConditionalHasFaction"]/subNodes/li[@Class="ThinkNode_ChancePerHour_Mate"]