1. Hugging
   There aren’t too many people who don’t enjoy hugging their dogs. However, there are quite a few dogs that hate it when you hug them. In the wild, hugging, or rather one dog placing his paw on another dog’s back, is a way of establishing dominance. When you hug your dog, he may feel threatened or challenged
2. Walking Without Exploring
   Rainy or cold days are the worst for letting your dog do what comes naturally. You don’t want to be stuck outside for what seems like hours while your dog sniffs every tree, fire hydrant, and piece of grass he can find. Dogs hate not being able to sniff because smelling an object is how they learn and ‘see.’ Even if you let your dog sniff for a couple of minutes, you’ll be doing him a huge favor.
3. Teasing
   Typically, children are guiltier of teasing dogs than adults, but plenty of grown-ups think it’s funny. Teasing by barking at a barking dog or pulling a dog’s tail not only upsets the dog, it shows the world how immature a person truly is.
4. Being Lazy
   Dog, like people need stimulation. They hate lying around waiting for something to happen. Dogs need to be mentally and physically stimulated for them to be happy and stay out of trouble.
5. Patting
   Imagine how you would feel is someone came up to you and began to pet your face and head. Most dogs tolerate this type of behavior, but that doesn’t mean they like it. Dogs, like people, need their personal space.
   
6. Being Too Lenient
   Dogs are pack animals and you are the pack leader. In the wild, dogs look to the pack leader to set boundaries and make the rules. Domesticated dogs need this same kind of structure. If you don’t make rules, they will undoubtedly do something you don’t like.
7. Looking a Dog in the Eye
   Although this rule applies to some pets, it is really for those folks who approach a strange dog while looking him in the eye. In the wild, dogs challenge one another by staring each other in the eye. For your own safety, never approach a dog while you’re staring at it.
8. Too Much Baby Talk
   Dogs do not understand our language besides key words and phrases they’re able to articulate the sound to a specific action or response. If you baby talk your dog too much, the mumbled phrases you’re saying to them just won’t comprehend and you could possibly run into a situation where your dog ignores you all together.
9. Being Tense
   Dogs have the uncanny ability to pick up on their human’s emotions. If you’re tense, dogs sense that and feed off it. It stresses the dog when you’re feeling stressed out, especially when you’re walking the dog. Try to relax and enjoy the time with your canine friend.
10. Forcing People on Your Dog
    If your dog doesn’t like someone, chances are, there’s a good reason. Forcing your dog to interact with a person he doesn’t like only causes him stress and may make him like the person even less.

Source: http://www.answers.com/article/1216827/10-things-you-apos-ll-be-surprised-to-find-out-your-dog-hates