@EsmeSusanOgg I laughed reading that study thinking how my Beagle cross would deal with the tests presented. He has three ways of solving food puzzles.
- Bash the item hiding the food with his head or feet He had a lot of success with this method with early food puzzles he was given (treats under plastic cups).
- Pick the item up and shake it as hard as he can (he has found this works wonderfully with treat balls that are supposed to be rolled around the floor)
- And if all else fails, just eat it. All of it. The puzzle and the treats.
Of course, breed effects behaviour and also physical traits eg Beagles are very food-orientated and their brain tends to migrate to their nose when they pick up an interesting scent. Labs are well known to eat everything and anything including flooring and furniture. If it fits in their mouth, they will eat it.
Aggression is viewed and studied differently to other behaviours because unlike scent work, chasing, herding and guarding, aggression is not a behaviour that is innate to the Canidae Genus family.
Studies into wild Canidae species (Wolves, Dingoes, Jackals, African Wild Dogs etc.) have shown they typically avoid aggressive interactions with their own species and instead use calming behaviours and visual and vocal communications to interact. They'll avoid interactions with humans and other species they are not familiar with. They certainly don't view humans, even small ones, as prey animals.
Studies into packs of feral dogs have shown the same, with the exception of Chihuahuas who we all know are assholes. They avoid aggression and human contact; even when they live closely with humans, they generally do not pose a threat.
Although studies into pet dog aggression are always thought to be flawed (due to the inability to control environmental factors and the limited size of the test pool) they do often show trends, however, it is not Pitbulls who tend to come out on top regarding aggression towards humans (nor it is labs, fwiw, labs are thought to have the highest number of bites because more of them exist), it is dachshunds and chihuahuas who usually come out as the most aggressive. Bull breeds can have a propensity to be more aggressive towards other dogs but even then they are beaten to first place by Dachshunds and Chis.
One recent study actually showed that bull breeds are pretty similar to labs when it comes to stranger aggression and less likely than labs to show aggression to their owners.
this is the study but you have to pay for full access