Hmmmm I don't think my dogs have favorite toys.
I do have a lot of toys for them but I don't know that any are their favorites. Emily likes squeeky balls I guess, and well anything she can retrieve. I even throw her leash for her sometimes when I forget a toy.
I'd say Clipse's favorite toy would be his legs!!! The only thing that boy cares about is running. As soon as I let him off leash he takes off running. I have to make him lie down and stay so that he will rest.
My dogs also like anything that I play with them with, such as pop bottles, paper towel rolls, etc. They aren't too picky. The one thing I REALLY wish was their favorite toy?? Their dumbbells, LOL