
I would agree. Olease do not get another dog until your present dogs problems are sorted out. this can only happen with refularm positive exposure to other dogs. I sugest joining a training class, it is never too late. I have helped convince an older dog that other dogs ren't the enemy, and eventually for her to look forward to interacting with other dogs, and gaining the ability to just make her wished to them known without going OTT into attack mode.
An example where havi9ng another dog will make things worse is below.
My lot are very bold and people and dog freindly. The sister of my youngest went to a Mother and Daughter near by whose oldest had died leaving the younger (9 or 10year old) totally bereft.
Unfortunately without the Alpha female this dog had absolutely no confidence, and was frightened of noise and heavy traffic. By 16 - 20 weeks the pup was refusing to go for walks, and then refusing to walk down the street as by digging it's heels in it knew the elderly lady who was at home in the day would take her down the quiet footpath alongside their house.
It wasn't until I started takeing her and her older companion on socialisation walks with one or two of my own that she started to get better as did the adult.
The adult had always coped by just becoming introverted, she hated th traffic, crowds etc, and just ignored them, but quaking inwardly and showing all the classic fear/stress signals (lip licking watching intently) but no panic so even her owners were not really aware just how frightened she was, but the Pup sure did, and having much more Gumption flatly refused to go where she knew from the older dogs reaction that there was danger.
Now fianally at 18 months the youngster has matured past the older dog and doesn't take any notice of her reactions, but the work had to be put in to convince her that the older dogs fears were unfounded.
I think I lost the battle to convince the owners to continue socialisting the adult to improve her confidence, as somethow they think it kinder to avoid all the things that frighten her, but thankfully the young one is now confident enough in herself.