13 days old puppy cant breathe good. please help me
 

Hi. im new in this forum, I have seen it before but never posted anything here, and my main language isnt english.
Anyway, my female yorkie had puppies 13 days ago, 4 male puppies, but one of them died when he born. There was one that born smaller than the other 2, and when days was passing, he didnt grow like the others and their diference in size is huge now. Im very sad because we wanna keep this puppy, we even got a name for him, and even when he ate, his weight was really low. Right now, he has his nose closed with some goo (he didnt have this before) and he cant breath with his nose, he breaths with his mouth and slowly, dosnt move like before, and dosnt wanna eat. Please help me, only thing vet said when she saw him is that he is underweighted, but i dont think is normal. I will post a pic so you can see the diference between he and his brothers.
I will really really really apreciate any help or advice you can give me. Even when he is just 13 days old we already love him, because he is just unusual and cute.
Thank you

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I hope your little guy is doing better and someone can give you some advice... the breeder section might be a good area to also post

I am so sorry I hope someone here can help you figure out what is wrong. Can you clean out his nose a little like whne babies are little and they have to have thier nose sucked out? I don't know any thing about babies that little and hopefully someone here will help you.

Duplicate post.