my Bitch is on day 46 and not eating, I have to always hand feed her before she can eat a little, I am worried because according to what I have read this is the period she is suppose to me eating much.

Have you got her on puppy food which has a higher nutritional value so she won't need to eat as much in quantity, adding something tasty to the kibble like small amount of mature grated cheese or moist dog food should make it more appealing.

Are you worming her daily with Panacur 10% as a worm load can put her off her food. 

Hopefully she pick up soon as the puppies grow very quickly in these latter weeks and will take what they need at the cost to Mums condition.

You could give her vet/nutro drops which have high calories in a small amount, increasing her energy level and making her hungry.  

I started giving her puppy food since last week, and also give her whole chicken every day. when I cook the chicken she refuse eating it so I have to fry it before she can accept to eat it. I only stop giving her chicken 4 days ago and stated feeding her with the kebbles alone.

What does she usually eat ewobaba? Dogs that are not used to kibble may well not find it very appetising. Personally I would go with whatever she will eat, fried chicken if need be. And Rhodachs idea of giving nutro drops is good advice.

One bitch of ours ate very badly while she was in whelp. She looked awful by the time she had them, but the pups were fine and normal weights for the breed. They can be such a worry!

We have just had a litter of 7 puppies, 2 weeks old now, our bitch was exactly
The same from about 3-4 weeks into her pregnacy she just didnt want to
Eat, and i must say it was a huge worry for us and a massive battle to get her to eat so i can understand your stress, we tryed everything, vets told us to give her puppy food but she wasnt interested in that at all, we tryed lotsa different things chicken was the main thing we could get her to eat, we tryed to keep up With the protein, we also tryed rice pudding which she ate ocasionally but soon got bored of it, pilchards in tomatoe sauce you could try or white fish, scrambled eggs we also tryed, we just basically tryed to give her whatever she would eat, i no they advise you increase there food towards then end of pregnancy but that just goes out of the window when you have a bitch that wont eat, just get what you can down her, we also gave our bitch drinks of lactol the last couple weeks as she wasnt eating well and this is full nutrients etc  she drank quite abit of this each day,and can be given to pregnant bitches, we also had to hand feed our bitch throughout
Most of this time as this was the only way to get her to eat, eventually she wouldnt eat chicken or anything else so i blended some puppy food with lactol and water and syringed it into her mouth, which she took fine and at least i knew i was getting something into her,i used to do abit every few hours, my bitch didnt loose any weight although im very suprised from the little she ate! Pups were born healthy we lost one sadly at 1 week old, all the other were born good sizes and are healthy.