So I've been leaving my ducks' food dish sitting out day and night, refilling every few days from the backstock that I keep sealed in 5 gallon buckets, and haven't really thought too much about it until yesterday when I saw a mouse take a visit to the dish in broad daylight. Cheeky little thing! Should I be concerned? Are there any diseases that could cross between them? Is this not a big deal since they all live outside anyway and are sure to cross paths at some point?