I am having trouble with my oldest dog(7yrs). when my oldest son lived with us Shasha and Kane had a few confrontations before they got along. Since then she has been the only dog until sept when we introduced Maggie(18 mo) and again they had a confrontation and were good together. Now my son asked us to take care of a 12 week lab until he returns from overseas(6-12mo) Shasha now positions herself so they can't get out the door or come. in. She has always carried her food and once settling in a room eat. Now she is growling at Sammy and again with maddi not only about her food but some times when they get to close.then at times she is their best friend and plays . Any help to restore the calm atmosphere?

[wishbone]

Aggression on territory might be happening on your dogs. You got teach them "no" command when they are growling or spray them with water if they are not listening. Give them enough exercise and play around to let them socialize enough with each other.

[lil mutt]

I suggest you visit the link below... the humane society have information about dog agression and what you can do with your problem.

Aggression | The Humane Society of the United States