OK, so I guess you'll have some examples of these open competitions and the sorts of dogs that win them... Are any huskies among the top dogs? Or are the top dogs mostly those traditionally bred to herd sheep?
You'll find a good cross-section of results here:
I'm not aware of any Huskies specifically, but they are usually trained to herd reindeer, so their style of herding is likely too aggressive for sheep. They're sometimes used as cattle dogs, though, but as explained before the herding trait is not as important as their biddability. Border Collies are highly biddable but they're not the smartest dog, and so require very tight control. This is why they work in the Gathering style, rather than any of the Traditional or the Loose-Eyed styles.
It also depends which type of sheep you're working and how they have been trained, too. Most Border Collies apparently struggle with the independence of Range Sheep.
This is what you got confused by;
https://www.science.org/doi/10.1126/science.abk0639 predictions for individual dogs... but we're not talking about individual dogs we're talking about a whole population of XL Bullies, that there's some variance here to the point where reliable predictions re: individual dogs will be shaky doesn't negate that there are traits associated with breeds overall.
Not just "some" variance, but too much variance.
"Among behavioral traits, biddability—how well dogs respond to human direction—was the most heritable by breed but varied significantly among individual dogs. Thus, dog breed is generally a poor predictor of individual behavior and should not be used to inform decisions relating to selection of a pet dog"
In other words, because there is such a wide variance from one individual to the next, (ie within-breed variance) that spread across the overall breed is too wide to
correctly associate a specific behaviour with a breed.
How biddable an individual is will be defined by what genes they have inherited, but the variance within the whole breed points to biddability being more influenced by environmental factors as a whole.
Remember, heritability (within or between breeds) estimates how much of the
behavioural variance between individuals of a sample size is due to genetic factors - It does NOT decide how much of a behavioural trait is genetic, nor does it indicate any likelihood of inheritance, at either breed or individual level.
Furthermore:
"Although many physical traits were associated with breeds, behavior was much more variable among individual dogs. In general, physical trait heritability was a greater predictor of breed but was not necessarily a predictor of breed ancestry in mutts".
Pick a dog, any dog - You are more likely to guess what breed it is by its appearance, so long as it's a purebred, but not by its behaviour.
"Most behavioral traits are heritable [heritability (h2) > 25%], and admixture patterns in mixed-breed dogs reveal breed propensities. Breed explains just 9% of behavioral variation in individuals. Genome-wide association analyses identify 11 loci that are significantly associated with behavior, and characteristic breed behaviors exhibit genetic complexity. Behavioral loci are not unusually differentiated in breeds, but breed propensities align, albeit weakly, with ancestral function. We propose that behaviors perceived as characteristic of modern breeds derive from thousands of years of polygenic adaptation that predates breed formation, with modern breeds distinguished primarily by aesthetic traits"
In other words, breed does not define behaviour. Genetic ancestry gives some indication of possible inclination, but again heritability is the factor.
"Through our community science project Darwin’s Ark, we enrolled a diverse cohort of pet dogs to explore the complicated, and sometimes unexpectedly weak, relationship between breed and behavior".
Says it all, really.
Also, the notion that the issues with XL Bullies are down to a few bad breeders is pure cope, they're literally bred from fighting dogs, as an illustration of this issue; half of the XL bullies in the UK are descended from that one notorious one. Where are all these "good" XL Bully breeders?
Starting with that ancestry - There are a good 20-30 different breeds that are literally bred from fighting dogs, some lineages of which are still bred and trained for fighting to this day, even though the primary roles for such dogs are hunting and herding.
Half of all UK XLBs descend from "Killer Kimbo"... Well, the dog in question was only called 'Kimbo'. The dog himself seemingly did nothing more dangerous than exist and breed, with no history of undesirable behaviour in either him or his direct offspring. The "Killer" name was slapped on him by BullyWatch, who were the ones pointing out that
a few of his 600+ descendents had been involved in attacks.
Gloria Zsigmond, a UK-based scientist with BullyWatch, has said:
"Kimbo bled into all those bloodlines because he was early on and he was so dominant in breeding. There are some good bloodlines where Kimbo isn’t there, but there are many where he is".
So what is Killer Kimbo so notorious for, exactly?
It's just you getting into a complete muddle re: stats/uncertainty, why deny what ought to be pretty obvious to anyone familiar with dogs:
You're using a study limited to pedigree dogs, that examines the heritability of traits (behavioural and physical), and finds that breed-conforming pedigree examples do indeed conform to their breed standards... No ****, Sherlock!
This they conclude is a result of high heritability, asserting their findings to be
"on average, five times higher than traditional within-breed estimates, which could be due to limited genetic and phenotypic variation within breeds". They also mention that: "a larger fraction of phenotypic variance across breeds is explained by genetic factors compared with typical within-breed studies".
Another study, which references the one above, states:
"Modern breeds are commonly ascribed characteristic temperaments, and behavioral proclivities on the basis of their purported ancestral function. By extension, the breed ancestry of an individual dog is assumed to be predictive of temperament and behavior, with dog DNA tests marketed as tools for learning about a dog’s personality and training needs. Studies, however, found that
within-breed behavioral variation approaches levels similar to the variation between breeds, suggesting that such predictions are error prone even in purebred dogs".
So either way, whether considering within-breed or between-breed, heritability does not reflect inheritance and breed does not define behaviour.
Balance this against the evidence of some XLB breeders stuffing their dogs full of steroids and training them in playgrounds to attack target - Is it more likely that XLBs are all bad just because some come from a common ancestor... or is it more likely that being badly mistreated adversely affects those dogs?