How it works ? 

Well first of all when you tame a wolf now if you are close to it you can see if it lives as if it were a BOSS, if you have many dogs and it is somewhat annoying to see all those bars above add that when you are sitting you cannot see its life bar as shown in the following photos:

Sitting wolf:

Wolf not sitting:

Apart from now being able to see the life of your pet, now your pet can also grow by being constantly in fights and exploration with you, the longer you take it and take it for a walk the stronger it will become.
At first your dog will be at level 0 and little by little he will level up, all you have to do is take him with you to explore
Every time you level up, a message will appear in the chat saying to what level you have risen as shown below:

The maximum level is level 10.
For each level that your pet goes up, it will grow a little in size and its DAMAGE and HEALTH will go up
As you can see, I am with my friend Pedro, he is now small and cute, but when he grows up he will be a big and strong dog.
Just like his brother Pablo who is at level 10:

Pablo:

Pablo, at being level 10, can really mop the floor with any monster, but unfortunately for Pablo, one of those days when we were exploring this happened...

One dark night, while it was raining, Pablo had met with Gomez, the Iron Golem from a nearby village, which attacked Pablo without mercy, which he did what he could to defend himself, but in the end the inevitable happened despite the fact that Pablo was big and strong. He could not win in the water, simply the arms of Gomez and the push were too much for poor Pablo who, swimming and with a height disadvantage, tried to fight to defend himself to be able to see his younger brother Pedro the next day... but unfortunately that was the last time that we saw Pablo, those from the nearby village say that that day 3 lightning bolts fell from heaven showing the fury that the world went through when it saw the fall of a hero, Pablo you will always be in my heart and in that of your brother who seeks revenge .. he knows that it is an almost impossible idea despite being so small he wants to become as strong as his brother and take revenge on Gomez for which he needs my help to become stronger and equipment that I will create soon.

Curable:

In case you did not know in minecraft you can cure your pet so that it does not have a tragic destiny and can recover its life, almost with any meat you can do it as shown in the image:

Cooked food heals our pet more life, or that's what I thought

Mount:

Now when your pet is level 5 you can ride and go with him, soon I will add the armor for the dogs ^^ thanks for reading

Future updates:

One of these two is the ones that I will add in the future, it will depend on YOU to COMMENT which of the two updates you want me to add the first or the second

1.-Add armor to dogs

1.-Add objects for the dogs to improve them.