If you are worried your puppy is not feeding enough weigh him everyday at the same time eg just after feed. You will see how much weight he is gaining, pugs are often very bad mothers so make sure to help your bitch lie down and the pups latch on.
it takes months for the newborn to take enough colostrum that's why it is really important that newborns are breastfed.
milk
Yes they do!
milk from its mum
The mother feeds the newborn dolphin milk from mammary glands near her anal opening.
They are not being fed enough and are probably not getting enough protein in their diet.
Once a day, usually early in the morning.
Newborn rats can be bottle fed with KMR, a kitten replacement formula.
The bunny might not be being fed enough or is dehydrated. It also may be because it is old.
For a newborn 0-12 weeks you should feed them formula bought from the grocery store or a pet store specifically designed for puppies.
Directly after giving birth she will be very tired, so give her time. Also, she may get up in a while and after they are fed, but she will always come back and repeat this until they are old enough.
They may have been disturbed, the lamb may be too weak to follow or the ewe is not being fed enough to produce enough milk for the lamb and her to survive.