The puppies are 4 weeks old. Today I saw one of them have white poop. It actually looked like bird droppings, mush and a little fluid. The puppy is alert and active. She is drinking normally & ate some soaked kibble. Could this be a reaction to the heat? Feedback would be greatly appreciated.

White usually means they are not absorbing the nutrients from the food. Hope they aren't outside, just taking a few trips outside to play for short periods of time in the heat?