Hi, my large breed bitch is currently on eukanuba large breed puppy whilst she is feeding her litter, she has always done well on the everyday diet but now with the extra work she looks to thin and has scurf on her rump.  If I feed her more she just poos more, so i need some recommendations for a new food, I have been considering royal canin, burns and jwb. She also has chicken wings and meaty bones. Any suggestions would be greatly appreciated. 

You could try feeding your bitch some cooked mince lambs breast. This is very high in fat.

My girls normally have Royal Canin maxi adult as part of their normal diet, amongst other veggies etc, and Ive put my pregnant bitch on RC Maxi Baby dog food and she is looking very well.

Its normal for a bitch to be pooping more with the extra food and pressure on the bowel etc from the pups, so I wouldn't worry too much about that. :)