well i did not see this happening i put a jar in with my silver,everything seemed fine.Last night i heard a splash(sounded like someone threw a roast beef in the tank) and ran out to find the silver with his mouth around the jars head???I quickly opened the top and just doing that made the silver release the jar.Now the jar has a ripped up head but not much damage.I never would have thought that my silver would be the tough guy??