Dogs can suffer injuries just like humans can. There are many different ways that your vet might deal with a dog knee injury, and so it is important that you get all of the info from your vet that you can in order to make the best possible decision for your dog. None of us ever want our best friends to suffer, and so we will generally choose whatever solution the vet says is best. While some vets might tell you that you always need to put your dog into surgery for their knee injury, the fact of the matter is that there might be a much simpler way to deal with the knee injury than immediately putting them into surgery.
For instance, any sort of ligament strain will usually heal on its own without any need for surgery. Of course, humans are generally told to not put much weight on a knee if it is suffering from a ligament strain. Dogs, unfortunately, tend to want to hide their pain and not show their injuries, so it is much more difficult for them to just rest and stop putting weight on their legs. Because of this, you need the proper treatments that will help them to fully recover without continuing to make the injury even worse.
One of the great things that you can do for your dog in this situation is to put a knee brace on them. This will help them to distribute their weight in a way that will not cause continual damage to the ligament, while also holding the knee in a proper place so that it can heal properly. Dogs will likely still want to remain mobile throughout the healing process, which is why it is so important to make sure that you have a brace for them so that they will be able to heal correctly and get back to their normal selves. If you get the right brace for the job, your dog will be good as new in no time.
As with anything else, it is important that you discuss all of this with your vet in order to see what they recommend that you do for your best friend.