I don't know how much experience you have around elephants but your uniformed jump to conclusions, based on a few photos without context, is along the lines of a sensational animal rights fanatic. You are basing all this on a few sparse photos and what else, do you work with elephants? How do you know the milk has dried up? A lactating cow's breasts do not have to appear engorged all the time. Supplemental feedings are needed in some cases, hence the bottle.
In regards to the calf's head position being lowered. Firstly, one image shows the calf napping with a relaxed trunk on the ground and eyes closed so of course the head is down. The second image shows the head down when the photo was taken. I guarantee if you saw video of this moment in time you would see the head moving up and down in various positions based on the locomotion and behaviors being expressed. Africans tend to carry their head below the shoulder line, it is part of their anatomy and neutral stance.
You have no context of when this photo was taken, so how can you make that call? Have you seen a newborn elephant before? When a calf is first born they are on the thin side, Africans more so. During the first months the weight can fluctuate in a healthy calf. In this image the calf is not covered in blood, as per a newborn, but that doesn't mean it wasn't recently cleaned/born. In the next set of photos, without the mother, the calf looks healthy with a full, non gaunt appearance. The zygomatic arch on the face is not showing, the iliac crest is not prominent and yes, the spine is visible but that is normal.
Based on what information? The uninformed conclusions of Javier Iniguez?
Same as above, you have no idea of when this photo was taken. Newborn calves can often look thin before they start feeding from the dam, putting on weight, and building muscle mass. This is just a single photo, the elephants are not chained normally or with any regularity. The chain is to ensure the safety of the calf when hormones are running high in the initial introduction phase.
A lot of the responses on here are pure speculation based on very few sources of information or first hand experience. How many of you have visited the ICC and spoke to the staff there? Or been around real elephant calves in person? I have, so it is disheartening to see all the vile accusations against them from people with no real knowledge of elephants other than reciting records from elephant.se and thinking they know it all.