If you have a fearful dog that shows aggressive behavior towards strangers or other dogs, you should seek professional help. Here are some tips in the meantime:
What To Do: You should remain calm, upbeat, and pleasant when your dog is around unfamiliar people since they will feed off of your body language- good or bad. You need to help your dog to focus on you and try to prevent them from reaching an extreme state of anxiety or reactivity around their triggers. When working with your dog be upbeat and confident (or pretend to the best of your abilities).
Your dog is trying to drive people away with their aggressive displays. They will be much more comfortable when they can learn that with distance and you being their advocate by keeping them safe and providing distance from the person they fear, nothing is going to hurt them. When you are with your dog around people that make them anxious be their advocate and set them up for success.
Reward your dog with treats, petting, and praise for non-reactive and calm behavior around people. People can toss them treats from a distance so they have a good association with them. If your dog is accepting of a person they would normally react to or is indifferent, make sure to reward them! Besides letting your dog know what is not acceptable you need to teach them what you would like them to do.
The treats you use for training your dog calm and non-reactive behavior around people should be their very favorite and only given when unfamiliar people are around or when you have guests over. Favorite treats include hot dogs, lunchmeat, cheese, and freeze-dried liver. I highly recommend using the clicker training method to teach your dog calm and non-reactive behavior around people. Clicker training is the best training method for getting anxious dogs to focus and learn in stressful situations. Owners I see who rely on using a Gentle Leader head collar alone and don’t use clicker training never reach the same level of success with this issue as owners who utilize both methods.
What Not To Do: Some people may advise “socializing” your fear aggressive dog to people they fear and surrounding them with people or going to public places. This is bad advice. The sensitive period for socialization in dogs is 3-12 weeks of age. After this if fear aggression develops, slowly desensitizing your dog one at a time to people they fear is the best approach. Forcing your dog to be surrounded by what they fear will only reinforce their fear making them uncomfortable and also more likely to use aggression to drive the scary people away. Don’t let strangers approach or pet your dog unless they are comfortable. Just tell them that they are in training and need some space. Watch out for “All Dogs Love Me” people. Assure them that your dog doesn’t love them and head for the hills if they keep insisting.
Never punish your dog for showing fear aggression. Punishment includes the use of aversive corrections (jerk corrections on lead, prong collars, shock collars, spraying with water, yelling, holding your dog by the muzzle, putting your dog into a submissive position, staring at your dog, scolding, and choke collars). Punishment or severe corrections will only make fear aggression worse as pain and fear will be associated with someone that already makes your dog fearful and uncomfortable. Punishment will increase your dog’s anxiety and it will also undermine your relationship with your dog. It is best to reward your dog for calm and appropriate behavior around people so they know what to do. If you create a positive relationship with your dog they will want to please you.
On the flip side of things, if you soothe your dog with baby talk, reassurance, or petting when they are being reactive around people you could be feeding into their anxiety and inadvertently rewarding them for aggressive behavior. You should be upbeat, calm, and relaxed when people are around. Show your dog through your behavior that they have nothing to be anxious about.
Avoid Triggers for Your Dog’s Aggression Towards People: Do not push your dog into situations in which they are bound to be uncomfortable, such as in crowds or in close proximity to strangers. You need to be their advocate and keep the people away from them that they show fear aggression to.
Teach people how to behave around your dog. It is best for them to ignore your dog, to not initiate contact with your dog, to turn away from your dog while sitting, and to avoid direct eye contact with your dog to keep your dog more comfortable in their presence. Behaviors such as hugging, petting over the head, staring at, grabbing by the collar, and looming/standing over a dog are considered threats or dominance behaviors in the dog world and may make your dog more likely to behave aggressively. If you don’t trust that a person can follow your instructions or they really set your dog off, put your dog in a crate or another room with some fun things to do (food puzzles, toys, etc.- as long as they won’t guard them). Your dog doesn’t have to interact with everybody and you may find that everyone, including your dog, is more comfortable this way.
Fear aggressive dogs may be triggered when a person speaks excitedly, uses hand gestures, or moves suddenly. Let people know to be conscious of their body language. Make a point to hold your dog on leash when people get up or walk away (fear aggressive dogs will often lunge at a person as they get up to leave or turn away). Your dog should be wearing their Gentle Leader with a leash or drag line attached when you have new people over the house.
Learn to interpret your dog’s body language when they are showing anxiety or reactivity to people. Some signs that a dog is frightened (besides cowering, shaking, and freezing) include: ears back and to the side or flattened, lowered head, paw lifting, tail down or tucked, whites of eyes showing, cowering, shaking, freezing, tense drawn back lips, panting with spoon-shaped tongue, squatting rear legs, looking away or avoiding eye contact, squinting eyes, braced front legs, rigidity, pressing into wall, leaning, hiding, rounded back, lowered body position, submissive urination, sweating through footpads, turning away, forming a C shape with the body, and drooling excessively. A very fearful dog won’t accept food and they may drink excessively.
Signs that a dog may be aggressive include: stiffness, staring, forward center of gravity, lips C-shaped, teeth bared, lunging, sharp barking, freezing, and stillness. Make sure to keep in mind that dogs wag their tail when they are excited about something, not always because they are happy about it.
Some dogs may also show displacement behaviors (sometimes referred to as “calming signals”) when they are conflicted such as licking their lips, tongue-flicking, scratching themselves¸ sniffing the ground, shaking (like a wet dog shake), or frequent yawning.
If you notice your dog freezing or becoming very still around a person, be careful, as this could mean they are going to bite them. Do your best to remain calm and redirect your dog if possible. Try using a “Watch Me” command (reward your dog for direct eye contact) or “Check In” command (reward your dog for touching their nose to your closed hand).
Provide a Safe Place: Your dog needs a safe place to retreat to in your home so they can get away from people if they want to. If you have a crate I recommend putting a sheet over the sides and back of it (leave the front uncovered) to make it more den-like. Many people also opt to use a room in the house. Give your dog a bed, toys, and a water dish there. When your dog is in their safe space they should not be approached by anyone they are reactive to. Provide your dog with special toys and long-lasting treats to enjoy in their safe space while you have people over. You may find that both your guest and your dog are more comfortable. This is a good option when you don’t want to actively train and supervise your dog around guests and it will prevent your dog from honing in on their aggressive skills.