Appetite changes...your thoughts?

[Kathy, Harley & Roxie]

I didn't post this in the food group because it's not really a food question.  Harley has become a very light eater.  He has gotten to where he seldom eats breakfast, but most of the time will eat dinner.  We feed him twice a day, have not changed his food since he was approx 4 mths old (taste of the wild)  We give minimal treats.  He also doesn't seem to be drinking as much.  He frequently goes to work with my husband and today for instance, he did not eat or drink while there, but big drink once he got home.  Pee and potty seems normal, he doesn't act sick other than hubby thinks he seems more restless than usual. He has lost 5lbs over the last month (78lbs today).  He will be 1yr the 25th of this month.  Not sure if he is just getting out of the puppy phase and we are seeing a more adult like appetite.  Also he still loves his favorite treats when offered, but have noticed he has gotten more "picky" (spit out the treat offered at the store.  I wasn't too concerned until I weighed him.  Any thoughts?  

[Martha & Cooper]

I agree with what the other have said here.   Better to be safe than sorry.  A general checkup might be in order.  That is a lot of weight to lose in a month.   With Cooper's recent illness, I found out that restlessness is an important symptom too, so be sure to mention that to the Vet.