The nin dog could change Naruto's social life as well. In the Naruto world, having a nin dog is kind of a big deal. It could attract more friends or comrades to Naruto. Also, the bond between Naruto and the dog could inspire others in the village. People might see how much Naruto cares for the dog and start to respect him more, which could lead to new opportunities and relationships for Naruto.
The nin dog could change Naruto's life by making him more responsible. Since he has to take care of the dog, he'll have to think about someone else's needs. For example, he'll need to make sure the dog is fed, trained, and healthy. This will give him a new sense of purpose outside of his normal ninja training and goals.
Perhaps the nin dog is actually an ancient and powerful being that has been sealed in the form of a dog for centuries. Naruto getting it could be part of some prophecy. As Naruto trains with the dog, he unlocks the dog's true form and powers bit by bit. This could involve him having to face some really tough challenges, like ancient curses or powerful enemies that are also interested in the dog's power.
If Naruto becomes a Suna Nin in fanfiction, the plot would change drastically. For one, his relationships with characters in Konoha would be strained. His bond with Sasuke might take a different turn as they would be on opposing sides. Also, Naruto would have to adapt to Suna's culture and ninja techniques. He might learn new jutsus specific to the Sand Village, which could make him an even more formidable ninja in a different way than he was in Konoha.
One possible storyline could be that Naruto discovers his nin dog has a special power. For example, the dog might be able to sense things that other ninjas can't, like hidden traps in a mission area. This could lead to Naruto and his team being able to avoid dangerous situations and complete their missions more smoothly. Another storyline could be the nin dog getting lost during a battle and Naruto has to search for it while also facing the enemy. It would add an emotional aspect as Naruto is very attached to his pet.
Naruto would probably be more patient. As a medic nin, he has to be careful and precise, which would require him to rein in his impulsive nature. He'd also be more empathetic, understanding the pain of others on a deeper level since he's responsible for healing them.
The nin wolf might be a gift from a powerful ninja in the fanfiction. Maybe as a sign of Naruto's growing power or a new mission he has to undertake. It could also be a wild creature that Naruto tames during his travels.
The nin dog would likely become another member of their group. Naruto's friends would have to adapt to having a non - human teammate. This could lead to some funny situations like trying to teach the dog ninja skills in a different way. The dog could also help Naruto be more responsible, which his friends would notice. It might make Naruto more reliable during missions as he has the nin dog to think about. And if the nin dog has a special bond with Naruto, it could make Naruto seem more mature in his friends' eyes as he takes care of this new responsibility.
The nin wolf could make Naruto more respected among his peers. Other characters might see Naruto as having an even greater potential with this powerful ally by his side. Some might be a bit jealous, like Sasuke, who could see Naruto's nin wolf as another way Naruto is getting stronger faster.
Kakashi could also end up being an ally. Despite his loyalty to the village, if he discovers the real reasons behind Naruto's departure and realizes that the village has made a mistake, he might choose to help Naruto secretly. He has a deep bond with Naruto and would not want to see him in harm's way.
Sasuke could potentially be an ally. Since they have a complex relationship, Sasuke might understand Naruto's situation and choose to side with him against the village. Also, characters like Jiraiya could still believe in Naruto and help him from the shadows.
As a Suna Nin in fanfiction, Naruto would have a very different daily life. He'd probably live in a different type of housing compared to Konoha. His missions would be more centered around Suna's needs, like protecting the village from threats in the desert. He'd also have to get used to the harsher climate of the Sand Village. And his friends would be mainly Suna ninjas, which means different personalities and ninja styles to interact with.