[The 4 M]

Hi hope someone can help. Molly has had her pups 6 weeks ago the pups stopped feeding a couple of days ago they were only feeding once a day for a week or so before that now the problem or me just over worrying for no reason as I do a lot when it come to Molly but she seems to be full of milk and I mean full is this normal ? should she see a vet? she is feeding fine cutting it down now to twice a day and is herself in all other ways. Thanks in advance