Can't do anything with it actualy. Bought myself new minecraft account, joined old save and now my doggo seems to be tamed by another person.

What was the name of your old account name before you got the minecraff account?

I don't remember. DataLeak or smthn. It was hijacked account, that was acccidentialy bruteforced by my big bro.

That would be the problem, since you're using a completely different account, the internal code is still associated with the old account (as how the vanilla dogs are aswell). Unless you had the 'Obey Others' set to true, you cannot interact with that dog with a different account

Ah, there is a config option. Nice. Anyway, thanks for help)

I don't have ObeyOthers option

The Obey Others option would have to be enabled when you interact with your dog with a stick (vhich opens the gui for managing the dog). But for you to do that, you would have to get into the other account and set the option to true

Also, what Minecraft version are you using?

1.12, and as i sad, my older account was not mine, and i don't have acces to it now :(

Oh.. well, you're going to have to start over with a new dog, and set the obey others to true just in case something like this happens again

So, i can disable dogs immortality, kill my doggo and tame another one?

Yeah

Do i need to close this issue now?

I'll do it for you 👍