I-E: depends on the dog. some can't stop barking, but others, lik.e hardly ever make a noise
Hmm, maybe introversion would be based on how much they need outside stimulus in order to be happy? In that sense, I'd argue that dogs are generally more extroverted than cats, although there might be variance. Barking is outward. I think that what needs to be considered is how external stimuli affect the interior, so we should examine the inward aspect thereof.
S-N: i'd say that all dogs are S. they live in the now, it's about the world around them.
In a sense, it can be argued that animals live in the moment, but there is variance here, too. There are animals that can predict future circumstances and will wait indefinitely until their predictions manifest. Others can connect two principles through inference, without direct experience. Perhaps this is more visible in cats, or maybe I have more experience with cats than with dogs. My uncle has 50 dogs and he can witness to the fact that they
do have their own personalities. Whether or not these personalities can be understood in terms of Jungian archetypes is another story...
T-F: hard to say. don't think it applies.
Actually, in this case some animals tend to be more sensitive to peoples' emotions than others. Again, my experience is with cats, but my girlfriend's dog has done similar things, by which I mean to say that when she was hurt or sad, he would get out of his way to come to her and just be with her through it. As I've said, I've had a similar experience with cats. As for thinking, it might also be expressed, although I'm not sure if we can call "learning" a purely thinking process.
P-J: J. they decide what they're about to do, not keep putting it off till the last moment. eat now!
As I in N, I've seen this happen.
That said, the greatest difficulties in understanding animal personalities are the following:
1. Introverted functions are less observable when there is no mutually intelligible communication.
2. Extroverted functions can easily be misinterpreted if one is not familiar with the manner in which animals express themselves.
That said, animals share two important things:
1. They have perception, so it can be inferred that they also have a perception function (Se, Si, Ne, Ni or maybe new functions can be invented for animals??)
2. They have the capacity to process information, so it can be inferred that they have a judging function (Fe, Fi, Te, Ti or maybe... "")
Without perception, they would have no information to act upon.
Without judging, they wouldn't process the information and it wouldn't have an effect on their reactions/conclusions.
But just what these functions are would require further analysis.
Agapooka