balls for my lab that wont get eaten

[OnlyWantsOne]

we go through about 10 tennis balls a week, not my dog - other dogs at the park eating them?

help?

Kongs are great!!

www.amazon.co.uk/s/?ie=UTF8&keywords=kong+toys&tag=googhydr-21&index=aps&hvadid=5814804560&ref=pd_sl_7wzyqyg2xs_b