@Birdrain92 , I have mentioned before and even today on this very thread that you can effectively deliver Safeguard to peas by putting the correct amount on bread or other treats. You just make sure that each bird gets the correct amount on his or her pieces of bread. Herd them into different corners of your pen and make sure the bird eats it before you let them back, and make sure you have spare plain bread (or whatever treat your birds like) to help divert the other bird(s) in the pen. You DON'T have to catch them or stress them out.
@KsKingBee has written before about putting the Safeguard into the mash that he feeds the birds, and he effectively delivers the correct dose of wormer without catching them.
Corid goes into the water, so you don't have to catch birds to give it. But you need to use an effective dose. The amount needed in the water varies depending on the situation.
Yes, stress will kill birds. Flying into things and breaking necks will kill birds. Worms will kill birds. Coccidia will kill birds. Parasites will kill birds. Ineffective treatment will kill birds. Lack of preventative health care will kill birds. None of us want dead birds.
We need to listen to each other and try to learn from our own and from other people's mistakes. We need to learn to recognize what is good advice and what is foolish. We need to learn how to figure out when somebody knows what they are talking about, and when someone is just repeating stuff that isn't necessarily based on fact or research, and might just be wishful thinking. We need to break things down into different pieces and analyze them. What is an effective treatment? What is an effective way to deliver that treatment? What does the research say? What makes an "expert?" We need to sort out the wheat from the chaff.