Looking at these for tug and chase toys to improve recall and attention to me. Have looked at the website and could easily spend a fortune - any recommendations? think the rabbit skin ones might go down well but how do they compare to the sheepskin and faux sheepskin ones? some reviews suggest the fur/sheepskin comes off easily. does the clam work well? Have a show cocker spaniel with slightly iffy recall, high food drive but equally distracted by squirrels, rabbits and the chance of finding food on walks!!