Thanks so much!
I was really worried yesterday, so i went home to check on him. he was pretty lethargic and wouldnt eat. I was home about an hour and by the end of it, he was eating a little and drinking a little. By last night, he was back to normal. Pooped this morning and its normal.
Giardia can come back? isn't it only from drinking dirty water? I had no idea.
Thanks for the advice on food. I had my previous boxers on royal canine and thought it was one of the best, so I did the same with our new little guy. I'll look into a new one.