A fine example of the principle that intermittent reward schedules are the most persistant
Let me break that down for you:
- when a dog does something that SOMETIMES works to get them what they want, they will persist with that behaviour for longer after it stops working than if it had ALWAYS worked up that point
It's the gambling effect. If bringing you something occasionally works, it is always worth one more try to see if it will work.
If I am reading you right, you have an other wise perfect dog except for the garden behaviour and the garden behaviour is specifically the obsession with bringing you things to throw?
Extinction will work. When it sops getting him what he wants, he will eventually stop doing it. That's just behavioural law
.
The challenge you have is...
a) it might take longer than your patience
b) he has a long history of it working, sometimes (as above)
c) he is likely to get worse before he gets better (an extinction burst in which he will exaggerate the behaviour for a while before he gives it up)
So, I think I would be looking to take this clever dog and teach him that bringing me anything at all results in something other than a throw.
For this summer I'd put a baby gate over the open door (like the ones you can get to protect fireplaces etc) so that he does not have free access.
I would limit any throwing at all to walks only. No one throws anything for the dog in the garden from now on AT ALL. He needs to reassess what a garden is for.
If he is reasonable about food, I would feed in the garden, to encourage calmer behaviour whilst in that location. Even if it means shutting the door so he cannot just bring stuff inside instead of eating. I would also hide treats in the garden (again, assuming he is ok with food) to encourage sniffing as a garden activity.
I would get a container with a lid and every time he brought me something, I would swap it for something he likes but is not as valuabe as a throw (e.g. a small treat) and place it in the basket and empty it when he's not looking. No high praise, just a calm swap out.
I would also hide all toys when not being played with by the children. I understand he brings you more than toys, but I would not leave them lying about begging to be retrieved.