Hi my girl had a C-section on 14th march 2 pups born healthy. but on Thursday morning we had to take the little girl to vets.
But she died later that day. Vet said she had a cleft palate right at the back of her mouth so she could not feed at all.
Why did they not check at birth for it the other one is fine, so why did they say she was healthy when she was not.
So now we have got a singleton pup, how do we feed mum, we have not had a singleton before so are worried how to treat him
when he gets older.

We have had two occasions when we had singleton puppies to rear, the first being my first litter when due to my inexperience, we lost the first out.  The second litter only ever was one.   With the first, having read all the books, I thought I had to be piling in the food (mum) when actually nature knew best and she really didn't eat very much at all.   Which was to be expected.   Singleton, or even a small litter = mum doesn't need to be piling in food.   Provided you rotate the puppy across all the teats, you should be able to avoid mastitis, but do keep checking because, again with too much food, she may be producing more milk than one puppy remotely needs.   I'd get her back onto her normal maintenance diet.  

As for him, all alone in the nest once mum decides not to spend much time in with him, which will probably happen, I stuffed a sock to lay alongside him for comfort.   And I have to say because I felt so sad for the single puppies, I carried each of them, each time, around with me.   The male, from the first 'litter', we sold and he went off by 8 weeks as I knew the people well, and he was doing fine.    With the second singleton puppy, she was a bitch and we kept her.  And she became really spoilt because of all my attention early days.  BUT we had another litter that same year (unusual for us but that's how it happened) so once we were down to the one we were keeping from that litter, we had him in with the singleton bitch so she had company.   We couldn't put our young Bassets in with the adult, for size difference alone.

Thank you Mamabas I will take your very good advice. the boy goes to all the teats it is so funny to watch

I'm interested that MamaBas spent a lot of effort on her singleton.  My Border Collie was a singleton and I was amazed how much time the breeder took to ensure that she spent time being his littermate, playing with him, socialising him etc.  He turned out to be no different to Border Collies that I've owned that had siblings.  But, as the breeder, you need to be sure that you are prepared to put in this extra work.

My friend had a singleton puppy and took 3 puppies from a large litter whose breeder lived in the vicinity and her bitch happily reared the 4 very comfortably, it gave the only one a chance to grow up as a puppy if that makes sense. I believe there is a Facebook page for foster mums or you could ask around if that would be something you are happy to do.

https://www.facebook.com/groups/orphanedpuppies/   is this the one mixed pack?
I know pup isnt orphaned but if mum might be able to help another litter and then singleton pup would have  others with him

My bitch also had a singleton and sadly died 5 days after helping. Through her breeder we found another bitch of the same breed who had whelped 5 days previously and was willing to adopt my pup for 7 weeks as part of her litter. Absolutely no trouble introducing new pup to the litter and the breeder sent me regular updates and photos and it was really lovely to see my pup as part of a litter, looked how it 'should'. Nothing sadder than seeing a new born pup on its own in the whelping pen :(

No, this incident was a few years ago before the advent of Facebook which makes communication so easy

Update on my singleton pup well he is 11 days old and weighs a 1lb, he looks really well eyes are starting to open.
When do you think it would be best to start weaning him at 3 weeks or before, Megan is mum is doing very well.

So pleased your puppy is progressing well, I would wean as normal starting around 3 weeks, I offer Nature Diet puppy food, just a small amount and if he wolfs it down then he is ready to start, I generally feed once a day for 3/4 days and then twice for 2 days then up to 4 times a day and let mum feed him if she wants to for as long as she wants. By 6 weeks she should be starting to dry herself off and probably staying away from him for most of the time, you will have to take the place of littermates for playtimes, he might like a couple of soft toys to snuggle, use ones larger than him to help prevent him chewing them.

I'd wean him at the usual time you'd wean.   Just because he's a singleton, assuming he's doing well and mum's still happy to be feeding him, shouldn't affect when you start weaning.