The pet is for sale. See OP for price. Your dragons will never become trainable, just like all pets stuck at 4 slots now (Cu's for example) will forever stay 4 slots. You assume Broadsword will put in efforts to "fix things" which does not happen unless it's game-breaking, and 3 slot dragons are not that.
Actually. Wall of text coming.
Patch 98. Dragons worked fine to train, but there were a number of exploits to increase/decrease HP, MANA.
You could lower your pet slots unaturally. (You couldnt make a 3 slot fresh tame dragon into a prepatch this way, as the calculation would change the slots to 4 slot . But at least prepatch dragons could be trained).
Then
patch 99 was about to hit. When dragons first became untrainable was to prevent them from being broken by accidental slot jump.
Bleak and Mesanna didnt know they even slot-jumped when we showed it to her just a few days before the patch release.
The quick fix was to make them untrainable at all and all the drama ensued from people thinking they wouldnt ever be trainable again.
Patch 100 , they re-enable training on dragons and add a WARNING MESSAGE that it jumps slot. But they dont need to make them entirely untrainable.
So people who want to train can do it if they wish to. But they are warned it jumps a slot.
Why is dragons still jumping slots?
We've had discussion with Bleak/Mesanna about prepatch dragons. No word yet on when it will happen, but the problem is they dont seem to have all data on what makes a dragon prepatch .
One thing that complicates things was a new exploit that popped up where you could raise STR of pets . Not going to say how it was done, but lets just say I saw cu sidhes with 2000 str.
I could suspect some dragons were fubbed this way too. So for PP ww's I cant say for sure why they dont jump slots but Im suspecting it has to do with checking for an old script that prepatch WW had. It's pretty easy to figure out if it is PP... Why? Well... It can eat gold if it is an old one!
If it's an old one, they have a check psuedo code: IF <= 760STR , make immune to slot jump.
Now, once Broadsword has identified a sure way to find out which dragons have been fubbed to look like prepatch dragons. I wouldnt doubt they can re-enable it.
Or they are simply waiting out anyone who fubbed a dragon to have 825str to give up and clear it out from stables, then eventually in future when they are sure the str/hp/mana fubbing exploits are fixed. They re-enable non-slot jumping.
I still have a legit PP ww that is ready at slot 4 with training all done, so I can just assign points. I think that's my rarest pet atm