Need some help please. Got 3 dogs living in one house unexpectedly. My 1 Yr old Cockerpoo along withy son's 2 dogs, 8 Yr old lakeland terrier Cross and a 6/7 month old American xl bully. Been in house for 4 weeks now initially my concern was the xl bully being too rough especially when my puppy hurt his shoulder. Took him to my friends whilst I was at work so he could rest it. Now he is better the xl bully is a lot calmer with him and not quite as rough. What the problem, now I find that the Cockerpoo and lakeland terrier cannot be in the same room together without fighting and snarling at each other. There are young children in the vicinity too so this is not acceptable. 2 dogs even have bark collars on. I think I'm the problem because I knew the lakeland terrier when he was a pup and my son lived with me and both are trying to protect me. I'm at the end of my tether and very close to tears just constantly worrying.