Tennis ball shooters?

Jasper has rediscovered the joy of ball chuckers in the back garden. I have rediscovered that they upset my neck and shoulder muscles in no time at all. Has anyone ever tried a gun-type tennis ball shooter or something similar?

I was tempted by this one but looking at reviews, it only throws the ball about 30 feet and even I can manage that! https://www.amazon.co.uk/Nerf-Dog-T...ds=dog+nerf+gun&qid=1556556529&s=books&sr=8-1

Ideally I'd love one of those toys where the dog drops the ball in the top and it shoots it out of the base, but they cost a LOT, I doubt they throw the ball that far... and Jasper may well decide that it's not really any fun unless Mum is doing most of the work....

My dads friend has a grass tennis court and she has one if these ball shooters. They’re great! You load the top with lots of balls and it automatically fires them

Dennis has a great time when he goes!