If you suspect that your birds have worms, I recommend that you worm them with valbazen (albendazole) liquid cattle/sheep wormer. Use a syringe (without needle) to administer orally. Dosage is 1/2cc for standard size birds, 1/4cc for smaller birds.
You can also worm them with safeguard liquid goat wormer (fenbendazole.) Use a syringe (without needle) to administer orally. Dosage is 1cc for giants, 3/4cc for large fowl, 1/2cc for standards, 1/4cc for smaller birds.
With either wormer, you'll need to redose your birds 10 days later to kill larva missed from the first dosing. There's a 24 day withdrawal from start to finish with both wormers. Both wormers can be purchased from Jefferslivestock.com or call them.
Your birds are one year old, it's up to you whether you want to worm them or not. I normally start worming at 8-9 months and worm every 3 months thereafter due to our warm moist soil conditions, condusive for worms.
Edited: To administer orally, pull the wattles down and the mouth will open. Slowly squirt the liquid in the mouth with the syringe, then release the wattles so that the bird will swallow the liquid on her own.