^^^ But the question is. are animal feelings only complex computer (brain) responses? Or do they somehow have emotions. The OP tests suggest that there is far less emotion than owners might think.
But, in humans, feelings are not brain responses? every emotion is produced by a brain. The only difference between us and dogs is that we are aware of this emotion and are able to express it verbally.
Do you think that a shrimp, a fish or a mosquito feel emotions? I don't think so. But I think a dog does have emotions, because it shows them quite clearly.
Part of the point is that the human brain is far greater than the dog brain. The dog can only do complex math-like operations with its brain to recognize where its benefits come from. Total operation to get its daily needs fulfilled. Total show. And people are falling for it like flies in a bug spray.
The tests in the site in the OP show this, even if the site doesn't state it simply and clearly.