[@Hillan]Guess who's surely had a mouse trailing after him on one of his foraging ventures? >.> 
Or... he'd at least have offered on multiple occasions, it would be up to Ekko to accept the help. 

[@Cyrania]Stranger danger!
Is not a thing Redwallers are known for saying... Seriously, like, occasionally they could have considered it at least once... Anywhoodle, given as Marigold has not been to Redwall yet, chances are exceedingly good that Rigby doesn't know her. lol He'll be quite happy to shake her paw and invite her back to the Abbey when they do meet, though. :)