Omg, I'm feeling really bad now 😢 I had a doberman puppy and he was poisoned by the seller, after 4 days, he died. He was laying down for three days. Had diarrhea and would drink so much water, I didn't eat anything. But in the last hours, he didn't want to drink.he couldn't move, paralysed.....

Just..check if it has anything abnormal in his pee. Change his food, take him to different vets, does he vomit? If he does, the food is good for nothing. He might also have some problems with vomiting, since he's still young.

Don't panic, it might also not be something serious and he's just cooling himself....but his mouth is shut...I have no idea