getting a new JRT

Question
I currently have a 9 month old JRT who is neutered and really well behaved and obedient.  He does however have some separation anxiety but isnt destructive, he just sleeps and cries.  I have been wanting to get a second dog because I feel that dogs are better in pairs so that they can have a pack.  Well I found out today (from a dogowner at the dog park) there is a JRT that needs to be rescued from a family thats keeping the male puppy locked in a cage outside constantly.  I really want to adopt him but worry about how my male JRT is going to handle it.  Are they too close in age since theyre both puppies?  Is it a problem that theyre both males?? PLease let me know what you think!!

Thank you!

Answer
Hi Carissa,
I wish I had an easy answer for you, but honestly there is just no way to know if the two will get along until you try it. If they are both neutered that will help a little as far as aggression is concerned. Keep in mind that your current Jack might panic more at the prospect of a new dog in the family (like you are replacing HIM) so you'll have to be diligent in training and give lots of reassurance to him that he is still number one!)
If and when you bring the new dog home, have them meet outside on neutral territory (like on the front lawn etc..) don't let him walk right into your home like he belongs there. Your current dog should go in first and "invite" the new comer in (have the new dog follow the current dog in).  
It's definitely possible to own and train the two to live together but it will take A LOT of work - especially if the new guy has been caged up for 9 months, he's going to be a little more difficult to train). Males tend to be more territorial too, so it might be a little hard at first, but they still are "puppies" and sooner is better than later to introduce a new dog into a home that already has a dog.  There WILL be one that is more dominant over the other, it's just the way nature made it, but dominant is different than aggressive - keep a close eye out.   
See if you can take him on a trial basis first with the stipulation that you can return him in the event that he doesn't get along with your other dog - get it in writing!
If it doesn't work out with this dog, try a young spayed female.
Best of luck!