I have something interesting for you. First of all your work is wonderful ....I love elephants to begin with and what man kind has done to them should be made to known to everyone in the world.
Leonardo the greatest painter of the all perhaps as I studied him had so many tiny details that he followed and perhaps one of them would help you as well. He was always careful to make sure that the muscles of things went "IN" or creased themselves inward as any pressure was applied because this is what happens in real life. That tail the little one hangs onto maybe would have looked even more real if the tail tissue went in at the top and bottom of where the babies truck grabs hold. As it is now it looks like a solid stick and not too much flesh and bone. Anyhow it's great work and I thought you would find my insight nice to know even if you didn't agree with it or had something else in mind here. good work.