Trim the Fur

• Before you can treat your boxer's mosquito bites, it may be useful to trim away the fur surrounding the affected area. This will make it easier to reach, wash and monitor the bites. You can trim your dog's fur using a pair of safety scissors or a razor. Be careful not to cut your dog's skin, as this can expose it to infection.
  
  

Cleanse the Area

• Use warm water and a little baking soda to cleanse the affected areas. This solution is completely safe for dogs and will help to alleviate the itching. If your pet won't remain still, then have someone else hold your boxer while you wash the mosquito bites. Repeat this two to three times each day until the mosquito bites subside.
  
  

Apply Aloe Vera

• Apply a dot of aloe vera to each mosquito bite. Aloe vera will not harm your dog's skin and is not dangerous if your dog ingests it orally. In addition to promoting healing, the aloe vera will also help to ease any irritation or itching. Reapply the aloe vera at least twice a day, or more often as needed.
  
  

Monitor Pet's Behavior

• Whenever possible, discourage your boxer from licking or scratching the mosquito bites. Itching will only further irritate the skin and prolong the healing time. You don't need to use a cone or continually monitor your dog to prevent it from scratching the bites. Although it might take a little longer if your pet scratches them, the welts will eventually subside.