We pick up information all day....everyday. When we sleep, we 'sift through' all that information.
When there's something important we need to pay attention to, our subconscious plays it out in a dream....in a 'language' that your mind can relate to, but would make no sense to someone else. A dog, for example, would generally represent loyalty, companionship, and unconditional love. But if you had an intense fear, or dislike, of dogs, it may appear as a monster in a dream.
Likewise, to see your husband or boyfriend as a dog, it would suggest that you think he is loyal....or using today's slang, you could be thinking he's cheating on you.
But when you say, "my dreams are so convoluted and full of the minutest detail...", it suggests to me that you are a perfectionist and very 'detail oriented'. Also you are focused, aware, and very 'in tune' with what's going on around you everyday.
There's nothing wrong with being a perfectionist, unless you take it to an extreme level. But, sometimes you have to let the 'little things', or 'small stuff' slide.
I'm a perfectionist, and I pay attention to the smallest of details. And, like you, I used to have super involved dreams, full of so many details, that I had a hard time sleeping. Then one day, I decided 'not to sweat the small stuff'....and it helped. It took some time getting used to it, but now I only 'worry' about the things I can do something about. I still pay attention to small details, and I'm still a perfectionist....but only where it counts. And I don't let 'stuff' get to me. For example, if I feel I have been wronged, or feel I'm 'under attack', I say so. I don't 'go off' on that person, but I let them know that I won't take it either....in as nice a way as possible. I try to express my frustration, hurt feelings, happiness etc. That way it doesn't build up, and I don't get too many wacky dreams.

Tell yourself over and over you don't want to dream about bunnies and rainbows. Seriously! I know it sounds crazy, but when you dwell on something during the day, chances are you'll dream about it at night.
 So, dwell on bunnies and rainbows....tell yourself over and over that you don't want to dream about them.