Tortoise suddenly defecates when introduced to water?

[Flanman]

I know tortoises urinate in water quite often, but I was going to give my tortoise her weekly bathe and she started crapping everywhere? I cleaned the container immediately after and tried with a larger container and she does the same thing.

Anyone know if this is just a nervous reaction with tortoises or is there something wrong?

 

[Yvonne G]

It's also a defense mechanism.