My 4 lb Tank and 5 lb Joey LOVE to play with those big bouncy balls for yards - rubbery, most of the time they're a marbled color..haha, I stink at describing!!! They're pretty much as big as the ball, haha. Anyways...if I ask Joey to "show me" where the ball is, he will put one paw on it, and bark at me...if I neglect to see that he's "caught" the ball, he barks at me until I throw or kick it again for them...so cute! (and yes, it is playing fetch, in reverse) I don't know that my boys would be into picking a collar - it's more of a girl thing, I think, to care about fashion
That, or Callie is just WAY smarter than my boys!