Recently found a wild mallard duckling alone. Searched all day for any sign of other ducks in the area and found nothing. Duck has been in a brooder for 8 days now. With unmedicated chick starter, stuffed duck, water, heat lamp, etc. seems to be thriving. Getting bigger. It also eats small grasshoppers we find and feed to it. Don't know the sex obviously. Had a few questions Can a duckling have tap water? To drink or swim in? We have been doing bottled. Would getting another duckling be a good idea so this one isn't raised alone? And can domestic ducklings carry diseases that wild ducklings do not have immunity to? I would not want to bring another home just to have it give the mallard a disease and kill it. Any advice would be helpful!