wolf stat imbalances - why do they happen?

Hmm, I don't know, is anyone sure?  I can start keeping track.

I've heard it mentioned but never seen definitive proof/explanation :D

We know biomes are linked to stats:

• Strength: Finisher // Desert / Rainforest
• Speed: Chaser // DF / GL / Mountains / Prarie /
• Agility: Chaser // Taiga / Swamp
• Wisdom: Stalker / Herbalist // RP / Glacier 
• Smarts: Stalker / Herbalist //CF / Tundra

You can read about in the Scouting guide 

This is how we raised our strength and wisdom to be able to scout RF and Glacier. You can also check your user log for scouts to see the correlation.

Thank you! That'll help me unlock the glacier and jungle.

Maybe the stats in other wolves are just to do with the tasks they do/where they explore (including the lead) in that case?

These wolves are both chasers and have very similar stats, noticeable speed, they have only ever been chasers, nothing else, however they are also sisters. (So if anyone have unrelated wolves who have always been chasers, could you compare them?)
wolvden.com wolvden.com 

If that's the case it's probably entirely dependant on what tasks they do/where they explore :D

If anyone would like some 'test subjects' here I have 5 sisters, they have all had the same training, in the same hunting pack, they have each stuck to one role their entire life, same age, same proficiency etc.

The Stalker - wolvden.com 

The Chasers - wolvden.com

wolvden.com

wolvden.com

The Finisher - https://www.wolvden.com/wolf/82350 

I have two wolves that I'm pretty sure have only been chasers, and they do differ - one has 61 Agility and around 50 everything else including Speed, the other one has 64 Speed and only 50 Agility and most other stats - so they both have one high Chaser stat but it's not the same one.  But they could've also been born with different stats, I don't have that noted - pup stats are usually pretty even but I have a few where they're not.

For lead wolves I’ve seen most with high smarts & speed - I think they’re either more common potential gains from enemies or just more linked to the ‘easier’ enemies. The few times I’ve gotten strength it’s been from bears/mustelids which are... difficult.

Huh, it'd be interesting if it depended on what enemies you battled!  I know someone whose lead wolf has a lot of Strength, and someone who's mostly Agility/Wisdom, so clearly different things do happen, but for lead wolves there are so many possible factors.