If one of your dogs is uncomfortable, it will stare intensely at the other dog. The other dog may either return the stare, or lose interest. If both dogs are locked in an intense stare, be aware that tensions may be rising. To prevent a fight, you may want to separate the dogs. Certain dog movements--such as pulling their lips back, holding their head high or low, or baring their teethare meant to communicate a warning. If your dogs are acting this way towards one another, it may be best to separate them. If your dogs are making low, rumbly growls at one another, this can also indicate a warning. However, growls can sometimes be misleading. Look for the dogs' body language and other behaviors whenever you notice a growl. If it seems like they might be posturing to fight, it is best to separate them. All dog growls will sound a little different. It is important to listen to your dog and get a sense of the way it vocalizes. when necessary. If your dogs do manage to get into a physical brawl, you may need to intervene to prevent injury. Try some methods that can be done from a distance, in order to best prevent yourself from getting hurt. Some strategies include: Make a loud noise. Spray them with water. Use a barrier to split them up (such as a piece of wood). Throw a blanket over them. Mild aggression between dogs can usually be handled at home. However, aggression can quickly become dangerous and even deadly. If your dogs cannot seem to get along, do not hesitate to call a professional.
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One-sentence summary -- Watch the eyes. Recognize the dogs' posture and body language. Listen to the growls. , when necessary. Consult with an experienced animal behaviorist or trainer.

Newton's second law of motion states that when the forces acting on an object are unbalanced, the object will accelerate. This acceleration is dependent upon the net forces that act upon the object and the object's mass. Using this law, acceleration can be calculated when a known force is acting on an object of known mass. Newton's law can be represented by the equation Fnet = m x a, where Fnet is the total force acting on the object, m is the object's mass, and a is the acceleration of the object. When using this equation, keep your units in the metric system. Use kilograms (kg) for mass, newtons (N) for force, and meters per second squared (m/s2) for acceleration. To find the mass of an object, simply place it on a balance or scale and find its mass in grams. If you have a very large object, you may need to find a reference that can provide you with the mass. Larger objects will likely have a mass with the unit of kilograms (kg). For this equation, you will want to convert the mass into kilograms. If the mass you have is in grams simply divide that mass by 1000 to convert to kilograms. A net force is an unbalanced force. If you have two forces opposing each other and one is larger than the other, you will have a net force in the direction of the larger force. Acceleration happens when an unbalanced force acts on an object, causing it to change speeds towards the direction the force is pushing or pulling it. For example: Let's say you and your big brother are playing tug-of-war. You pull the rope to the left with a force of 5 newtons while your brother pulls the rope in the opposite direction with a force of 7 newtons. The net force on the rope is 2 newtons to the right, in the direction of your brother. In order to properly understand the units, know that 1 newton (N) is equal to 1 kilogram X meter/second squared (kg X m/s2). You can change this formula around to solve for acceleration by dividing both sides by the mass, so: a = F/m. To find the acceleration, simply divide the force by the mass of the object being accelerated. Force is directly proportional to the acceleration, meaning that a greater force will lead to a greater acceleration. Mass is inversely proportional to acceleration, meaning that with a greater mass, the acceleration will decrease.
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One-sentence summary -- Define Newton's Second Law of Motion. Find the mass of your object. Calculate the net force acting on your object. Rearrange the equation F = ma to solve for acceleration.

Though some believe a muzzle to be inhumane, many trainers regard it as a suitable tool for a suitable purpose, just like a dog collar or a leash. If you have trouble with your dog pursuing chickens with the intent to kill or eat them, a muzzle will make training safest for all of your animals. If your dog is especially excitable, you may want to keep him on a leash until he becomes calmer around your birds. Take him with you on your feeding chores to help him become even more accustomed to the chickens and the chickens more accustomed to him. Exercise simple commands like the compound sit-stay. You may want to practice this while entering the chicken coop to fetch your eggs, which has the added benefit of teaching your dog not to invade the boundary of the chicken coop. You can do this by rubbing down your chickens with damp cloth and putting that cloth in your dog's bed or pen. Dogs have a powerful sense of smell, so the scent of the chickens, when unfamiliar, can cause a strong reaction. While outside with your dog, you may see your chickens and/or roosters fighting. This is not especially uncommon, but can leave a valuable member of your egg laying team out of commission. With your dog on its lead, run towards the fighting animals and break up the scuffle. Once you have pulled the birds apart, practice one of your basic commands, or, if you've trained your dog in it, use the safe command. By showing your dog what to do in the event of a chicken fight, and rewarding him for helping you break it up, you will begin to teach him to run to help whenever he hears a chicken in distress. Your dog already has a keen sense of some wildlife predators, but crows and chicken hawks can be just as dangerous to younger birds and chicks as a fox. Together with your dog on his lead, shoo away crows or any other birds of prey. After you have successfully chased away the birds, praise your dog and feed him a treat. This will positively reinforce the behavior to protect chickens from birds of prey. As your dog becomes more trustworthy and proves he understands your commands and also your expectations of how he should act around your birds, you should allow him to patrol for critters. Thanks to your training in how to break up a chicken fight, he will race to the sound of a chicken in distress and help. You can't expect your canine companion to keep the chickens in line if he's out of shape. Go for regular walks, continue short, rapid fire training sessions, and show your dog he's a beloved part of your pack.
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One-sentence summary --
Consider a muzzle. Introduce your dog to chickens in the coop, gradually. Familiarize your dog with chicken scent. Teach your dog to break up rooster fights. Raise awareness in your dog of chicken predators. Allow your dog to patrol for raccoons. Exercise your dog.