Keep minimum distance while moving.

Hi Guys, Hope you are doing well. I have struck in a problem, I have googled it but did not found any satisfactory answer. My objective is to move different gameobjects randomly, like cats are moving in a room but want to keep a minimum distance among them.

I have tried the following code but the gameobject jerks while playing.

 #pragma strict
 var Kitten_RandomPosition : Vector3;
 var HouseCat_RandomPosition : Vector3;
 
 public var Kitten : GameObject;
 public var HouseCat : GameObject;
 
 InvokeRepeating("ChangeKittenPosition", 0, 1);
 InvokeRepeating("ChangeHouseCatPosition", 0, 1.4);
 
 function Start () 
 {
     Kitten_RandomPosition = Vector3(Random.Range(-8.0, 8.0),Random.Range(-4.0, 4.0), 0);
     HouseCat_RandomPosition = Vector3(Random.Range(-8.0, 8.0),Random.Range(-4.0, 4.0), 0);
 }
 
 function Update () 
 {
     
     if((Vector3.Distance(Kitten.transform.position, HouseCat.transform.position))<=2)
     {
         ChangeKittenPosition();
     }
     
     
     
     Kitten.transform.position = Vector3.MoveTowards(Kitten.transform.position, Kitten_RandomPosition, 2*Time.deltaTime) ;
     PlumpCat.transform.position = Vector3.MoveTowards(PlumpCat.transform.position, PlumpCat_RandomPosition, 2*Time.deltaTime) ;
 
 
 }
 
 
 function ChangeKittenPosition()
 {
     Kitten_RandomPosition = Vector3(Random.Range(-8.0, 8.0),Random.Range(-4.0, 4.0), 0);
 }
 
 function ChangeHouseCatPosition()
 {
     HouseCat_RandomPosition = Vector3(Random.Range(-8.0, 8.0),Random.Range(-4.0, 4.0), 0);
 }

Any Idea would be appreciated. Thank you