Last year we had this lamb that unfortunately lost her mother and I we didn't have any other sheep that could provide milk to her.
We bought the milk bottle for babies and the lamb was never hungry.
However, it might not have been enough for the little lamb. One morning we woke up and saw that she found a dog, who had just had her puppies, and started drinking her milk, directly from the source.
The dog was ok, she realised it was just another animal who didn't want to go hungry and didn't have a mother to feed her.