This is for mobile.

1)find a brontosaurus (high lvl)

2)get a ascended bow/crossbow with above 65 tranq arrow.

3)lore it to a huge cliff.

4)just use your bow/crossbow.

5)put bed nest to it and sleep.

6)after that if you have smoothing Pam use it.

7) give it kibble or berries and done.