Swollen puppys stomach

Question
My 4 month old chocolate lab got into my older dogs food today and needless to say ate like it was his last meal. His stomach is swollen and he's having a very rough time trying to go poop. He has managed to get a very little out but still not enough. His spirits are good but you can tell he's not 100%. Anything I can or should do from home or should I take him in??

Answer
This can be a very bad situation Mike. I would at least call an ER vet and talk to one near you.
There are many things that can go wrong with a belly full of food like that. Please call an ER vet asap.

I hope he will be okay. Don't risk it, call now.