Our protagonist team comes across a German Shepherd named Glen and he gets good pets. The dog is fine, and interacts with one of the soldiers before an enemy fires an explosive at the team. It is not shown whether or not the dog is even injured, but the soldier who was petting him gets away without injury; I prefer to assume the dog escapes.
Someone does have obvious thoughts of what happened to him previously that was very traumatic, and he talks about it and reacts when a similar situation comes up. It's not said he has PTSD, but it could be triggering for someone who does.