The dogs are here with people for about 1,000 yeas.
The dogs are here with people for about 1,000 years.

they are friendly, and cute.
They are friendly, and cute.

so, they are popular.
So they are popular.

and My favorite dog is Maltese terrier.
And my favorite dog is a Maltese terrier.

It is very small and friendly, so I like it.