Wait. Keep caring for him. When he is ready to fly you will know. When my baby birds were ready to fly I would hang their cage in a tree. After a few days I would open the door so they could leave. I kept food and water in the cage. Some of them would return to the cage for several days.
What makes you think the hay belly is caused by worms? What do you mean by hay belly? How old are these kids and what are they being fed? Could they be malnourished? Bloated? Pictures would help.
You won't like what I have to say. I can only tell you what I would do in your situation. I would put all the affected bunnies down. You can put a lot of time and effort into treating them, but in the end, it is unlikely the ones that survive will ever do well. You have to do what feels right to...
If you are going to set a live trap it is a good idea to leave it open for a few days, so they get used to going in and out of it before you try to trap them.
I have tamed any number of feral kittens by holding them by the scruff of the neck, putting them on my lap, and offering them bits of tuna fish on my finger.
Cornish X are not heat tolerant. I lived in an area of California where the summers were very hot. I would raise two batches of broilers each year. One batch I would order in the very early spring so they would be processed before the heat hit. The next batch I ordered in early fall so they...
What are you feeding them and how long do you have feed out for them during the day? I fed mine broiler feed, and they had access to feed from seven in the morning until seven at night. I don't know if this helps.
You can fix something to put the bait in so the rats can get in, but the chickens can't. I have mentioned this before. I used to work on a dairy that was absolutely overrun with rats. They were everywhere. Hundreds of them. My boss got something called Pitch Packs. They are small packets of...