For about a week we have been feeding our labrador bitch's litter, puppy food mixed with puppy milk, this is because the bitch now refuses to get into the puppy box for more than a couple of minutes, the puppies go to suckle on her as soon as she gets in. We've cut the puppies claws, but this hasn't made a difference. My concern is i've heard the bitch is still supposed to be feeding them and how do I know the puppies are getting enough nutrients and aren't hungry? Is the bitches behaviour normal? We feed them 3 times a way btw, Thanks in advance!