Is it not the other way round, and dog food is bad for cats? Although my farm cats sometimes have to have dog food if we have run out, and they wolf it down!!
When we had collies, I thought a litter of 6 was bad enough, never mnd 11. And when the pups started to eat, goodness, they could eat!! Fortunately we had a good milking goat at the time, and she kept them supplied....and we made big pans of porridge with soaked bread in it......but they stood in it, and it was all over their little faces, feet, what a mess!!!!
When we took on a rescue dog, the vet advised me to keep her on porridge, with honey added, to give her energy, and get weight on her....maybe your bitch will need something like that to give her the energy to look after that large litter¬¬