In one sentence, describe what the following article is about: Pain can change a dog's behavior. Even a friendly dog in great pain will be more likely to bite. Even a dog that has never bitten before may bite when approached if it is experiencing significant pain. A dog in pain may also bite if you touch or move a painful area. The natural response, when a painful area is touched, is to turn toward that area. The dog may try to bite out of instinct. You may first see warning signs such as growling. A dog on the verge of biting may pin its ears back or show its teeth. This is a natural protection mechanism that a dog may use to try to prevent further pain. A dog in pain may decrease its food consumption. If your dog suddenly has a decreased appetite, this may be a sign of pain. A dog with mouth pain may also drop food when it eats. A dog in pain may experience restlessness or an inability to get comfortable. Your dog may show this by pacing, repeatedly readjusting its position, or getting up and down frequently. A dog in pain may experience changes in its normal sleep schedule. A dog in pain may either sleep more than usual, or have difficulty sleeping. Unusual vocalizations including moaning, groaning, whimpering, yipping, and even growling can all be signs of pain. These sounds may be associated with particular movements, such as when first getting up. That can help to give you a clue about the nature of the pain. A dog that is normally vocal may also suddenly become quiet. Avoidance behaviors, such as hiding or shying away from contact with people or other animals are common when a dog is in pain. These behaviors are efforts to avoid potentially painful situations. If your dog moves its head away when you try to pet it or makes other moves to avoid touch, this can be a sign it is in pain. Take note of such behaviors if your dog normally likes being touched. These behaviors can go along with a dog being more withdrawn and less interactive than normal. You may also notice an attitude of depression or mental dullness if your dog is experiencing pain. Note that some dogs may seek more attention, rather than avoiding it, if they are in pain. You should take note of either avoidance or unusually high levels of attention-seeking behaviors. Being aware of your dog's normal bathroom habits can help you recognize many different problems. When a dog is in pain you may notice that it exhibits a different posture when it urinates or defecates. For example, a male dog that normally lifts his leg to urinate might not. You may also see a change in how often your dog needs to do its business. Or, your dog may have accidents if it is painful for them to get to the area where they usually go. Pain can also change the consistency of a dog's stool, due to the related stress. It can also lead to constipation.
Summary: Beware of biting. Monitor your dog's eating. Watch for signs of restlessness. Notice sleep changes. Listen for changes in the dog's vocalization. Look for avoidance behaviors. Pay attention to your dog's potty habits.

Problem: Article: While oven cleaner can be effective in getting rid of scorch marks, it should be used as a last resort because it is extremely caustic and may discolor the pan. You should never use it on a pan with a non-stick or other protective coating, though, because it will strip off the coating and ruin the pan. Because oven cleaner has the potential to damage cookware, you should only use it if you've tried other methods of cleaning your scorched pan and they've failed. If you're planning to toss the pan anyway, it's a worth a try to use the oven cleaner. Oven cleaner contains caustic chemicals that give off very strong fumes, so it's important to take safety precautions before you use it. Cover your hands with a pair of rubber gloves to keep your skin safe from the chemicals. You should also make sure that your kitchen is well-ventilated before spraying the oven cleaner, so open a window or two if possible. If you're especially sensitive to fumes, you may want to wear a dust mask over your nose and mouth when you're using the oven cleaner. Be sure to read all of the safety warnings on the oven cleaner's packaging so you're aware of any other safety precautions that you should take. Once you're prepared to work with the oven cleaner, spray it over the scorched areas of the pan. Because the cleaner is so caustic, you don't want to use any more than is necessary so cover the bottom of the pan with a light layer. You can use a brush to ensure that it's spread over the entire pan. While spray oven cleaners formulas are usually the most common, you can also find cream and foam formulas that may work better when you're cleaning a scorched pan. In order for the oven cleaner to fully penetrate the scorched areas and loosen the film and debris, you need to let it sit on the pan for at least a half hour. Because of the fumes, it's best to place the pan outside while the cleaner on it. Cover the pan with a lid, and set it on a table or ledge outside your home. If you don't have any area outside that you can set the pan, open a window and set it on the window ledge. After the cleaner has sat on the pan for approximately a half hour, use a scrub brush or sponge to scour the pan. The scorched film and debris should lift right off. Once you've cleaned the pan completely, make sure to rinse it extremely well to ensure that there's no residue from the oven cleaner left on the surface. If you're concerned about oven cleaner residue being left behind on the pan, wipe it down with a dry towel after you've rinsed it initially to see if anything comes off on the towel. You should definitely rinse it again if you notice any film, though you may want to rinse it again even if the pan is clean to be safe.
Summary:
Make sure your pan isn't non-stick. Put on gloves and open a window. Apply oven cleaner to bottom of the pan. Cover and set outside. Scrub the pan clean and rinse well.