If your child was recently bitten by another person's dogs, you need to brush up on Michigan's dog bite law, which is covered by MCLA 287.351. This law allows you to better understand what you will have to prove in order to be compensated for your child's injuries.
The first thing that you are going to have to prove is that your child had a right to be at the location where the bite occurred. If the bite occurred in a public place, such as at a park, then it is pretty easy to establish that your child had a right to be there. Or if the bite occurred in a business that is open to the public without any age restriction, your child had a right to be there.
Where it gets trickier is with private residencies. If your child was bitten at someone's home or on someone's property, you would need to prove that your child had a right to be there. You would need to prove that your child or your family were invited to be on the premise, or had been on the premise before and therefore had a lawful right to assume you could be there again. For example, if your child was bitten at a birthday party for a friend, it should be simple enough to prove that there was a party and you and your child had a lawful right to be there. Or, say your child went into your neighbor's yard to grab a soccer ball when they were bitten. That may be a little more complicated proving that your child had a right to be in your neighbor's yard; you would need to prove that your neighbor had extended that right in the past to your child.
The second thing that you are going to need to prove is that your child did not prove the dog or could not have reasonably known that their actions would provoke the dog. For example, if your child took a chew toy that he had seen the owner's throw for the dog, and was trying to throw it for the dog when they were bitten, your child was not acting in a provocative way. However, if your child was repeatedly taking the toy and hitting the dog when it was attacked, one could argue that your child had provoked the dog.
Finally, you will need to prove that your child was actually injured. If you took your child to the hospital or to your doctor, all you really need to do is provide the medical records to provoke that an injury occurred. If you have pictures to present of the injuries as well, this could strengthen your case.
If you can prove that your child had a right to be at the location where the bit occurred, was not provoking the dog and was injured by the dog's bite, then you should be able to pursue compensation from the dog's owners. Check it out for more information.
When you sell stock photography, there is always a risk that someone may use your image in a way that you didn't permit in the licensing agreement. When that happens, you need to protect your licensing rights. The best way to do that is to work with a copyright and licensing attorney. I've spent a lot of time researching fair use and licensing restrictions. I hope that the information here helps you to not only understand your rights as the creator but also to learn how to document and enforce those rights and seek legal resolutions when they are violated.