Last year the deer wiped out most of my daylily buds and flowers. I got a few flowers, then they got the rest of my Wild Horses.
This year, I started spraying Liquid Fence Deer and Rabbit Repellent as soon as I saw a scape forming. Plus I got a motion activated sprayer and planted chives in front of the Wild Horses bed. Had no problem with deer this past spring.....for whatever reason.
My neighbor feeds deer. We regularly see a doe and two fawns. I saw a nice buck jump our back fence a few days ago...in broad daylight.
I have planted more daylilies this year. I have several jugs of the repellent ready for spring. Will just have to wait and see what happens in the spring.
I do think getting something sprayed on the plants early is key. They have never bothered the foliage of the daylilies, just buds and flowers.
Good luck.