Yes, you can certainly help Daisy to overcome her anxiety over hearing bells ring!
My guess is that maybe at one point in time something bad happened at the same time as a bell rang. Or maybe as a puppy, bells rang and it frightened her and no one helped her overcome her feeling of fear.
My Gracie dog was terrified of squeaky/noisy dog toys. I mean terrified. One time a customer was playing with Gracie on the floor in my shop and the girl grabbed a talking stuffed parrot. Gracie slipped her harness and bolted for the door.
And then later my friend gave us a blue stuffed dog toy that looks nothing like a real dog. But if I showed it to her she would panic. Esp when I squeaked it. She would literally bare her teeth at it and growl. All fear.
What did I do? I started counter conditioning her to the animal first and then the sound. I would say: "Where's Blue?" and then say "Touch Blue" and when she touched it with her nose I gave her tons of high value treats. Made a fun game out of it with lots of praise and yummy food. She can see it/ touch it now with no panic.
Do the same with bells for Daisy. I would start with a light sounding SMALL bell, ring it at a distance from her, then give the treats. So Bell chime= food reward and "good job, daisy!" or "yes!" as I like to do for quick positive reinforcement. Say "yes!", then pay. Be generous with the food rewards because this is
Gradually increase the noise level of the bell, and the distance from Daisy. Maybe go to thrift stores and buys some different bells or wind chimes, etc. I'm sure you can find some Utube videos of bell sounds and play those for Daisy. Even some ring tones on our cell phones mimic bells. And you can vary the volume on your phone.
Practice several times a day in short sessions for best results.
Be creative, make a fun rewarding game of it, have patience and you will probably see that soon Daisy will look forward to a bell ringing since it comes with a paycheck for her
Counter conditioning works!!