"The dog has its own collar" is grammatically correct. Many people mistakenly use "it's" in this kind of sentence, but that is the contraction for "it is," not the possessive form of "it."
The correct sentence is He is allowed to do it on his own.
You cannot craft collars in Minecraft. By making a wild wolf a domesticated dog, it will automatically be given a collar. Unfortunately you cannot craft your own. To get a wild wolf to be your pet dog, just feed it meat or bones.
You already own a bicycle.
I can only guess at what you are trying to say, but I guess that this sentence should have been, understand it in your own home. You don't have to go to school to learn about this; you can understand it in your own home.
I own a sea dog.Come here, you salty old sea dog.
Do you own a computer? Grammatically it makes sense as a question. You do own a computer would be a suitable answer.
Yes, I can use "his" twice in a sentence: He gave his dog his favorite toy.
No. This is a clause that cannot stand on its own. It is not a complete sentence. A sentence needs a subject and a verb.
Yes, I can: I didn't get a ride, I got here on my own.
Every dog has its own personality, and the amount of training required varies accordingly. Most dogs will be trained in a few sessions. a hour
The little dog was having fun chasing his own tail.
He was afraid of the dog because it was a lot fiercer than his own one.