Well I posted Jake's picture in another location within this site and I guess I am fostering a Rat Terrier rather than a Jack Russell Terrier!  I have had Jake for about a month and ever since I brought him into the house he has had an issue with our Lab, Bishop.  At first Bishop would get aggressive and we would have to get the hose out but now he just chases him or barks at him.  He no longer attacks him.  Problem is that Jake still nips at his face if they are inside and his legs if they are outside.  I wouldn't blame Bishop if he put him in his place but fortunately he is a Lab; still he might one day.

I was using a small spray bottle and that worked but one of my Jacks hates water and runs out of the room every time I bring the bottle out.  I don't want to fix the problem with Bishop and create a new one with my Jack.  Does anyone have any suggestions to stop this behavior?  I don't even know why he is doing it!

I am definetly not letting the behavior go unnoticed.  I spray him with the hose or water bottle when ever he does it.  He has gotten much better but hasn't quit completely.  A few times I have "hidden" in the house when I have left them in the back and watched to see if he does it when I am gone.  I have not seen him do it.  Also my two Jacks protect Bishop and show dominance towards him when he does it.  They are not aggressive they just mount him to keep him away from Bishop.

I have had 2 dogs that hated each other after many years of just picking on one another.  I eventually had to keep them separated for 6 long years. I won't do that again.  Jake is a foster and will most likely be going to a permanent home soon.  I just wish I could break him of the behavior before he moves on.

Do you have any suggestions for stopping the behavior?