I am using the mama heating pad method for my 2 two day old ducklings as another member suggested. I read somewhere not to worry too much about the temperature with a heating pad, but my thermometer is reading between 82 and 85 degrees. Mostly staying at 82 degrees. They seem content as can be to me but my fiancee is insisting it needs to be 90 degrees for the first week. What should I do?? Thanks!