I made the mistake of training some wolves a good two days boat travel from my main base. I tried to get a pair of them to the base 3-4 times, and failed every time.

This was on my main world, where I get a pack of fuling every night, without fail, if I'm up too late.

I tried sailing straight through, but, of course, a sea serpent appeared and they went. I tried stopping for the night, but stopped too late, and the fulings stopped by to kill them. I tried stopping early enough to get camp setup before sundown, but then it stretched it out too long and something got them along the way.

That's not even mentioning the trouble with clearing the drake from the mountain just to bring them down to the boat!

I finally just went thought the whole process again on a closer mountain.