depression/not eating: German Shepard

Question
I have a german shepard that's approx. 6yrs of age. He from a litter of 10, his brother is also with us too, and the mother. I have been home for 6months, came back from Iraq as a contractor, again gone now for another 6months. Since I've been gone he has not eaten regularly, and I believe with me being gone he may have a depression problem. My girlfriend saids he runs and plays but when feeding time comes, he seldom will eat his food. Should she take him to the Vet and runs test; blood draws and such? But he's very smart and knows how to work my girlfriend and get her upset. And the next day he acts like nothing is wrong. What is your suggestion? It does worry her, and upsets her to where she cries about his condition. Please is there anything that could help? I would appreciate it much. We love our three German Shepards, and don't want to think about putting the one down that won't eat everyday. Thanks,
Roger Pierce

Answer
The right people are very important to any dog, but some more so than others and frequently very important to a German Shepherd.  It is rare, but not unknown for a dog to harm itself by not eating enough.  The question in this case is how badly do his ribs show?  Compare him to the pictures at http://www.longliveyourdog.com/twoplus/RateYourDog.aspx  As long as he is only on the low side, he should be OK.  German Shepherds tend to keep themselves on the lean side.

You are feeding a concentrated, meat based chow?  If not, switch to one.  Pedigree might be a good choice.  You might also look at a small breed puppy chow.  They are the highest calorie dog chow made.  I would rather see you stick to a dog chow than venture into table food.  The puppy chow might not be the ideal diet for an adult, but it is still much closer than some mixture of human food.  It is possible as he adjusts to your absence, he will eat better.  It is also possible he may have his ribs showing when you make it back, but basically be OK.  Depending on how he rates in the link I gave you, it may be time to see the vet.