If you'd like to try the exact model Margi has, send me the Amazon link and I will order then send to you... 
Mine are Frienda Classic Dog - I didn't click on Margi's link. But I think like many other things, they are all made in China and sold under multiple reseller names. Cheap, effective - but obviously if overused, the dogs might become accustomed.
Mine are Frienda Classic Dog - I didn't click on Margi's link. But I think like many other things, they are all made in China and sold under multiple reseller names. Cheap, effective - but obviously if overused, the dogs might become accustomed.