I have two shelties. One is just under 20 pounds and he has a very difficult time getting a regular sized tennis ball in his mouth, his mom has a plate and 15 screws in her arm and has a hard time throwing. These solve the problem for both of us. I have the chuck it throwing tool as well.
It's strong by It's me12/17/2012
My dog is hard on balls. She will destroy a cheep ball in 2 hours. She has been playing with the "chuck it ball" for 3 weeks and the fur is not ripped apart yet. It's a strong ball and made well.