I have 2 newborn Nigerian dwarf kids that were rejected by their mothers and so I am bottle feeding with the goat mother's milk. These are very tiny goats that took the bottle ok but they are not pooping. They had the black poop at first but do not seem to be eliminating now. How can I get them to go? One of them looks miserable and I gave him a little enema with warm water (5 mil) He pooped a little black but I think he is still all stuffed up. Also, how much milk should they be taking at a feeding. They have been taking 1-2 oz every 3-4 hours but they are preemie size goats. Thank you.