Hello and welcome to Just Answer,
How long has this change in behavior been occurring with Stoli?
Are his other habits still normal? eating?? drinking?? elimination??
Is he whimpering or acting painful at all?
Thanks and I will respond when you reply.
It could be a behavioral response and something (which you may never identify) may have spooked him. On the other hand, it is possible that this is his reaction to his not feeling well as some dogs will seek out their owners when they are anxious about not feeling normally. SInce he is eating and otherwise normal, you have the advantage of being able to monitor this for a few days to see if it improves. Try to keep him busy and get him out exercising so that it takes his mind off of what is bothering him. Try to schedule "play time" at around the same time of day so he has some sort of routine to look forward to. If he is not improving or his signs become more obvious, I would at least schedule him for an exam to see if you veterinarian can identify a possible cause.
Good luck with him and please let me know if you have any further questions.