I agree with Phred...especially if Tasha is protective of her food....
like Phred said...you don't want the first thing...eating to be a negative experience for anybody....
if you want to leave food down all the time,first make sure that He doesn't eat so much he gets sick....you can get those containers that let food out a little at a time,and just put in a different area than Buddy and Tasha...then he'll have His space and they have theirs....

Off Leash????
You've had your guys since pups,right???
Remember he is full grown....and already has ideas of his own...I'd hate for him to run off again....Like you say,Steve....get him some Leash Training.....
also, to make You and He feel better...when you let the other 2 run.....
You can go to a Feed,Tack Store and get a 20,25 or 30 ft. longe line....it is used to exercise horses....it is thick nylon....with snap on one end...for collar....and loop on other end for you to hold onto.....he can have a Nice Romp with this,and he won't be loose....In the U.S. they cost about $10.00....
I use this on Joey all the time,so he can get some of his "Bucks" out...and get tired too!!! he comes right home and sleeps!!!!
They Really are a Great Tool...I got All of my kids Fully Grown...So I Never have them off leash.....They came with Habits....I know that they would All be good ....Till a Bunny or Squirrel ran by...then they'd be Gone!!!
I can't risk that....

Listen to Me...I feel Like I'M Getting a New Dog!!!
It is just So exciting!!!

Sounds like you have all the right goodies to start.....

You'll be Such the Proud Pop!!!

Now for a Name.....Hmmmmm....

Do you like Auggie???
Frisco???

I know,it takes time to get to know him....

Keep us posted!!!!!