She bites because she is afraid, most ducks especially one you just get have no idea if they are going to be eaten or what. So try not to pick her up but sit calmly close by and let her get use to you offer her treats mine love dried meal worms and shredded lettuce romaine the best.Most ducks do...
Get a digital thermometer to put in the brooder so you can see what the temp is in there. and yes it needs heat but you have to be careful not to over heat. first week 90 each week there after drop by 5* thats why a thermometer is necessary Give your lil duckling a stuffed animal to snuggle with...