I have a black labrador who has the dual roles of being my pet and my working dog. I am blind and she is my guide dog, and as such she goes absolutely everywhere with me. Honestly I haven't left her for more than about half an hour in the 18 months I have had her.
In so many ways she is one of the best things to have happened to me, certainly since the PTSD took hold. She gives all of the unconditional love and acceptance and stable reliable tolerance that everyone has already written about in this thread, and she has also become very critical for me in managing flashbacks, nightmares and other symptomatic anxiety etc. She is really my primary grounding object and I have schooled myself for a long time now to look to her for reassurance that I am safe and in the present as soon as I am able to consciously do such a thing when I've been triggered. She's interminably patient as I cling to her at times and is very stable when I am distressed. Initially she would tend to become quite distressed and reactive herself if I was distressed, but she seems to have become accustomed to it now and now behaves as though nothing is happening, which is much healthier and more constructive for me.
Unfortunately there is a nasty downside to having her, and that is that one of her key benefits, ie, the fact that she goes everywhere with me, is also a real problem. She attracts public attention to an unbelievable level, both because she is a pretty and attractive looking dog, and because she is a guide dog, is in public places where dogs normally are not found, and attracts the kind of perverse fascination that people display in blind/disabled people generally. Sorry to be blunt, but it's true.
Needless to say we are endlessly bombarded by questions, interruptions, intrusions and, in many cases, very distressing invasions of personal space and privacy. I *hate* the public attention that she brings and deal appallingly with the advances of strangers into my personal space, which is one of my most consistent and distressing triggers.
Right now this problem is close to dabilitating for me. It's hard to admit that the thing that adds so much value to my life, both logistically through her role as a guide dog and on a more emotional/psychological level, is also such a constant stressor and attraction for triggers.
I know that learning to manage my anxieties with the public is yet another challenge that lies ahead of me, but gosh, it's hard to deal with .
Maddog