Hi, I would like to ask for the opinions of rescuers We adopted a dog from a shelter 3 months ago. It is a 3-4 years old male of mixed breed (about 25 kg weight). The first days it was "normally" anxious. We took it for walks, tried to establish the routine. After a month dog seemed calmer, got used to brushing, tried to be next to people. It is kept outside in the yard and has a dog house in a spacious kennel. Every evening we take it for sleep in its kennel. There is drama every evening. Anyone who tries to approach the dog with a leash )it already understands that the closing time has come) becomes an enemy: growling, barking and other aggressive dramas. It is on a leash for the first half of the day and it is allowed to run free for 4 hours in the afternoon before putting it to the kennel (there are regular walking, playing, swimming (when it is hot) sessions during the day too). Every evening we have to cheat it to bring to the kennel (like going for a walk). This week it ran away while chasing a fox. It returned after 24 hours and went to the porch of the house. When my father (he is actually walking and caring about the dog the most) approached it and talked softly, the dog aggressively attacked. Luckily my dad had swift reaction to avoid being bitten. After that "fight" the dog became very submissive and followed my mother to its kennel (she was bringing food) without any leash and any command. The next two days, the dog has been growling at all family members randomly no matter the place and the time of the day (even if we bring food). The dog also has guarding issues (we cannot play with any ball, because the dog does not understand sharing). But it is fine, it takes time to cure the latter issue. Has anyone ever experienced a similar aggressiveness issue? We are searching for advice what to do further. The shelter did not provide us with any history of the dog.