so just duck feed and no treats?
mine are used to change since they’ve been going places with us since they were like 2 days old, so would this still work?
i have a drake with them (who is bonded to them and would probably get depressed if he was seperated) so even if i didn’t pet her i don’t think this would work?
i do that daily, and feed eggs back to them
		
		
	 
The goals of all these tactics are to make the duck feel that this is not a good time to have babies.  It may or may not work.  Personally I wouldn't restrict my duck's food unless required for a health reason and told to by a veterinarian.
1) Daylight - it is winter, not safe to raise babies.
2) Not just no treats, but scratch only.  Not even duck food.  I was free feeding Mazuri duck food, and my vet had me feed scratch - and not even free feed.  I was horrified, but it worked.  I had to separate my ducks for feeding time so the other ducks could eat Mazuri.  Since scratch lacks nutrition the duck doesn't have the nutrients to make eggs.  Really, I would never be ok doing this without regular bloodwork and vet exams - which my duck had.  As my duck became older (5+ years) her vet told me to give her small amounts of Mazuri maintenance along with her scratch, but not layer.  Since as an older duck she needed the nutrition.
3) Hurricanes time is not a safe time to have babies.  I don't know if this will work for your ducks are not since they are used to an inconsistent routine.  But it won't hurt, right?  And it is one of the easiest to do.
4) My girls were very sexually active together and I never interrupted them.  My duck who had reproductive disease was the one duck who seemed to enjoy me touching her a little, and I did stop because my vet told me to and it was her life at risk.  I did continue to touch her bill and feet only.  And I head bobbed at her, and she head bobbed back at me to show affection that way.  I took her on long walks almost everyday and she enjoyed sitting close to me.
5) Great about removing the eggs!  Apparently keeping eggs around stimulate more egg production, as do nests.  If you want to reduce nutrition I wouldn't feed the eggs back to them.  But personally, I would only do that if they are having health issues with laying.
My dark khaki was an egg laying machine for the first few years of life, even giving eggs everyday all winter long.  She'll be 8 soon and hasn't had any issues aside from some lopsided or thin shelled eggs.  She takes winters off now.  I understand the fear of reproductive issues, very much.  I'm longing for the day my ducks experience henopause.
Are your sweethearts sick, or are you just afraid they'll become sick from the tax on their bodies from continuous egg production?