Awww, they're adorable!! I'm so sorry about the first little one- sometimes there's just nothing we can do to help.
About the milk, usually if you watch very carefully when they latch on and first begin to suckle, their ears will twitch very fast for a few seconds when they begin to get milk. If you see this, you know that there is milk. It can be hard to spot, so don't worry if you don't see it at first.
Also, like willowy said, if they are content and not squealing, they're probably fine. Lastly, if Mary is uncomfertable or stressed she may hold back her milk, but if she's lying down and purring to them, it should be fine.
About another kitten- sometimes they do take a bit of a "break" between kittens, but it is sometimes hard to tell if there is one left.
Congrats on the new babies! I told you they would eventually come
About the milk, usually if you watch very carefully when they latch on and first begin to suckle, their ears will twitch very fast for a few seconds when they begin to get milk. If you see this, you know that there is milk. It can be hard to spot, so don't worry if you don't see it at first.
Also, like willowy said, if they are content and not squealing, they're probably fine. Lastly, if Mary is uncomfertable or stressed she may hold back her milk, but if she's lying down and purring to them, it should be fine.
About another kitten- sometimes they do take a bit of a "break" between kittens, but it is sometimes hard to tell if there is one left.
Congrats on the new babies! I told you they would eventually come