In the past I was using Cydectin at freshening, but recently I saw that it has a 56 day milk withdrawl time.....that's a looooong time! Am I better off using something else? What do y'all use at freshening? I used Ivermectin plus this week on all my does who are due in the next month. Should I use it again in 10 days? I'm in Texas & of course our weather has been crazy!