Were there veterinarians to help the wounded animals in the war?

To some degree, this will depend upon what war you are talking about. Presuming you are asking about the United States military, starting with the Vietnam War and going to WWI, there were very few veterinarians in the military and most of them were either State-side providing service at the military bases or were deployed in support situations rather than the front lines. However, wounded animals were treated when possible by corpsmen and human physicians, although they were handled only after human casualities were addressed and when there was sufficient medical supplies to do so. Since the early 1990s, this has shifted somewhat as the nature of war has shifted - as the front lines have blurred and the concept of "active combat zone" has become less clear, veterinarians who are deployed with their units are seeing service animals coming in for acute trauma treatment. The medical supply situation has also improved, as these service animals are extremely expensive and can save hundreds of soldiers' lives with their training.