My GSD that is 8 months old and getting quite large is obsessed with her chuckit ball and launcher. She loves them. How do I know if she is in danger of swallowing a ball? We have the medium sized ball and launcher. She can fit the whole ball in her mouth and she is chopping on it the whole time she is bringing it back to me. Sometimes it pops out of her mouth, being a rubber ball that is slippery with saliva. I fear it may accidentally shoot back into her throat. Should I get the larger sized ball? She is going to be a large GSD when she is done growing.