ohHH, Saaysfaa, i am so embarrassed, i did NOT have a roughcoat collie, i had a roughcoat border collie! I am so sorry, (hangs head) See, i am so enmeshed in border collies, that we sometimes refer to a BC by his coat, "roughcoat" "silky" "short hair" etc, but i did NOT have a roughcoat collie, and i have never been around one, either, and now, i realize what you meant, by your opinion that THAT coat could be seen as dysfunctional.
I might agree, that is a pretty excessive coat! Might be needed wherever that breed is from (i do not know off top of my head). All my remarks about roughcoats, were about roughcoat border collies, ha. I still think most any dog benefits from training and exercise.
Also, i did NOT mean to imply that 1 or 2 of EVERY litter has either the shy-dog disorder (also called 'fear aggressive') or the dog-aggressive disorder, and until you asked, i did not realize i could be interpreted to be saying that! From now on, i will be more careful to word it more like this:
When a dog is born with a neurobiological disorder, it is usually only one of two of the litter, WHEN THIS OCCURS if at all,
and is not the entire litter.
It is NOT NOT NOT "EVERY" litter if that is what you thought i was saying, oh heavens no!! No, not at all!!
In years of studying this, (as amateur) i have never ever even heard of an entire litter being stricken, not ever. Neither has anyone i know of who studies these dogs. Have you?
I know of two breeders who owned stud dogs who were cranking out shy dogs, and these breeders were actually aware it was a neurobiological disorder (again, rare that anyone knows this, most times, if a human reaches for a dog, and the dog ducks away, the human cries out, "oh, it's been abused!" even if it never was)
and it was always only 1 or 2 of the litter. The rest of the litter, was 'normal' as were the stud dogs. (again, shyness has levels, not all shy dogs become aggressive, especially if well managed)
EDIT: shy dog CAN bite their first human, at much older than 1 year old, if the dog was very well managed prior. Still, their owner usually has noticed the dog does not like to be TOUCHED by unknown humans by 1 year old, and again, not ALL shy dogs ever escalate to an actual bite.
The research i read on this topic, is mostly from geneticists in Norway, Japan, Germany, Korea and Harvard and all around the globe, and veterinary geneticists on Pubmed, Google scholar, and similar academic sites. I have corresponded with this one team that does work in Norway. I have a best pal who is a human geneticist, and she helps me interpret the research, as well as send me the full report for free now and then, (some reports cost up to $50 just to read it).
there are decades of this research, but, sadly, most people in the dog world do not usually turn to science for answers, instead, they read blogs with zero footnotes.
Many various types of scientists study these dogs, for various reasons, some study it to help agricultural applications for tracing genes, more often, it is just to help decode alleles and genes, track genes, some teams study it in hope of learning info which could be applied to humans with various neurobiological disorders, some are employed by Big Pharma, all kinds of scientists, and all kinds of reasons these dogs are studied. Also, dogs with known and small gene pools are sometimes attractive to geneticists for various reasons.
Sadly, many of the geneticist teams lump both the shy dog who bites humans, in together with the dog-aggressive dogs, but, some researchers do identify those two kinds of dogs have two different kinds of disorders. (btw, the shy dog can escalate to also include aggression towards dogs, as well, making the two kinds of dogs harder to distinguish, but, often, with rehab, the shy dog can be brought to accept unknown dogs again..Less common, but, can happen, is finding a dog-aggressive dog who has escalated to react to unknown humans, but, if this happens, the DA dog can usually be quickly rehabbed to stop that secondary target)
If someone does have a dog that reacts to both targets (humans AND dogs)
Almost invariably, the primary target is the one that showed up first in the dog. so if the owner first noted the dog is reacting to humans, and later, the dog also began reacting to dogs as well, most likely, that is 'shy' dog, as targetting humans showed up FIRST.
Lots of other ways to sort out dogs who react to BOTH targets, but, usually which target shows up FIRST is a good way to begin.
Also, shy dogs who become 'fear-aggressive' tend to manifest a few months earlier than DA dogs, as early as 6 mos sometimes. Da dogs generally manfest at about 9 mos old, but, can begin as early as 7 mos old, or as late as 12 mos old. It is a rare dog who manifests much later, or a very "unusual" or "usually isolated from other dogs" human who doesn't notice it prior.
It is very very very rare to find a human living with either type of dog, who does not know their dog is "not right". by age 1 year old.
i digress. I am fascinated by this topic, as you can see! ha ha
The two kinds of dogs both have visible differences in their amydalas, in other areas of their brains, but, do NOT have the same differences as each other. The two types of dogs have two types of differences.
Both kinds of dogs (the shy dog, and the DA dog) both have abnormalities in their numbers of receptor indices on their brain surfaces as well as their baseline levels of many neurchemicals, like serotonin, dopamine, etc. but, sometimes, the abnormalities are in different directions than each other. Fascinating!!
Other blood testing reveals other abnormalities in these dogs, some of which seem random to me, such as their zinc levels. I have no idea what that is about. (btw, most people in the dog world only test thyroid levels in the dog, when dog is aggressive, if thyroid level is WNL, the person then decides, the dog was "raised wrong")
but, sadly, some researchers who study aggressive dogs, do lump the two kinds together as all the same, but, they are not the same.
EDIT: my pal who is a geneticist, recently sent me some research, that indicates "impulsivity" in dogs may be on the DNA!! who knew? It is only early research, but, fascinating.