Sarge love to chew. I hear it's the field line in him. He especially loves the flowers in the backyard!
She is however DEATH on hard plastic objects. We got her a rubber chicken once as a joke . . . it lasted about five minutes then was decapitated, had its feet removed and both wings chewed off. The barbeque grill brush also met a horrible fate. You can't leave hard plastic retrieving bumpers within reach either because they wind up with holes chewed in them (and then they sink!)
Thankfully she doesn't swallow the bits. The worst Labrador Foreign Object Ingestion Emergency we've had is when the cats knocked the tupperware butter container off the counter and Shelley cracked it open. The cats got some of the butter, but Shelley got the lion's share along with the wrapper. When she started throwing up little bits of butter wrapper we got worried . . . but a mild diet of rice and chicken broth for 3 days did the trick. She didn't even get pancreatitis . . . < whew >