
Pregnant bitches can veer between not eating and wanting to inhale food.
I never increase the amount of food until the 6th weeks as until then the puppies are not a significant size.
An overweight bitch is a poor prospect at whelping.
I monitor their weight in the same way as I would normally checking body condition, but taking into account and enlarging abdomen, so they should be pregnant but fit and slim.
I slowly increase the food over th4e last 3 weeks to about half as much again as normal by whelping, ti is only then that I really start feeding ,usually four times their normal amounts if anything over 4 puppies.