It’s a variety of issues at Plankendael. Kanvar does not need any “lessons” from an older bull. He both knows what to do, and has the desire to breed cows. He regularly mounts and breeds with Yu Yu Yin, Suki, and Tun Kai, although obviously nothing comes of these matings.
For whatever reason though, Kai Mook and May Tagu will not allow him to successfully breed them, generally in the form of them simply not stopping walking for Kanvar to properly mount them.
Kanvar is the largest elephant at Plankendael, in both height and weight. He’s not huge, but definitely the biggest by a noticeable degree. The issue likely stems more from a lack of assertiveness from Kanvar. He seems to mostly just gently chase the cows around when he wants to breed, which apparently isn’t working for the two breeding cows.
Also in regards to transferring, as mentioned, Kanvar is EXTREMELY genetically valuable, he is essentially a founder, the only living descendant from two wild caught parents. May Tagu is also fairly genetically valuable as well. The other three girls are all of only moderate genetic value through their well represented sires sides, but it’s still a priority to breed from them to help flesh out their herd structure. Ultimately it’s just wasting Kanvar‘s genetic value by retaining him at Plankendael, until he sires some offspring there’s always a risk he could potentially die without having any living descendants, so it’s best to get him off to a herd that will accept his more gentle approach to the cows. Personally I think Pairi Daiza would be a good place for him to go, they can send Po Chin off to bachelor holding, and in his place Kanvar will have 9 cows of assorted ages to breed with, all of which barring the few youngest having extensive experience with births in a herd setting.