Is Lemon Balm ok for piggies?

[Fox'n'muffin]

My buns love it, and the piggies get other herb but I haven't tried them on lemon balm yet, but it's gone bonkers in the garden this year, so they might as well enjoy it if it's safe for them

 

[Piggie Life]

It is ok for Guinea Pigs but don't give them too much as on Guinea Lynx it says it is a mild sedative to Guinea Pigs.