My dog kneads like a cat and sucks his teddy bear.?

He is a 9 month old chi-mini pin mix (we think.). We adopted him a week ago. He has a teddy bear that he kneads on like a cat does and he sucks on its nose. It is admittedly cute, but is it something I should be concerned about (obsessive/compulsive behavior? I have had dogs before but not seen this habit - chewing yes, but not the sucking.