If you mean something belonging to one dog, as in "the dog's mouth", like that.
If you mean something belonging to two or more dogs, as in "All dogs' mouths", like that.
spell it dog's. This means the collar belongs to the dog. (one dog possessive) dogs' - The dogs' owner took them to the park. (more than one dog possessive). If your original sentence was about more than one dog then you would write it like this: The dogs' collars are red.
The three brothers' dogs.
The possessive form for the plural noun dogs is dogs'.Example: All of the dogs' collars have a tag imprinted with their name.
The possessive form of the plural noun dogs is dogs'.The dogs stay:in a dogs' kennelin the dogs' housesin the dogs' owners' housesin the dogs' cages at the pet shop
The possessive is a normal singuar possessive, therapist's (of, about, or belonging to one therapist).
The plural possessive of "library" is libraries'.
Mickey's
The noun dog's is the singular possessive form (one dog, one collar).The plural possessive form is dogs' (The dogs' leather collars).
The possessive of the singular noun alto is alto's.
The possessive "my" is "mi" in Spanish.
Hayden's
Translation: posesivo