Thank you for all the advice!
I made another wooden enclosure just slightly off the snow biome and at the edge of the meadows. (slightly further away than the last enclosure). Stayed there for one night and the wolf was 'tamed' by the next day! So 2 days basically.
We made sure food was in the enclosure before we trapped him and checked on the wolf maybe just twice while he was there.
Though when walking him back to our base which isn't too far he was attacking everything in sight, which is normal i guess, tho his 'red bar' was slighlty down & it said wolf was also 'frightened' ?? why would that be ?
There is a small area of black forest we had to pass thru where there were a few greylings which he was killing and i killed also ... would that be why he was frightened maybe ?
Also is it ok to leave the wolf at our base while we go off to other biomes in the portal ? we are currently in a large snow biome getting silver.