My questions are about worming, vaccination,, bumble foot etc. health of the bird and feed.
1) worming
2) feeding at different ages of the birds life.
3) vaccination
thank you
1) For worming I use safeguard for goats. I use the liquid kind, but some people use the paste. For free-range birds the paste is better because you can put the paste on pieces of bread or some sort of treat, then the birds will eat it and get wormed at the same time. I don't have experience with the paste though, and so you would have to ask someone else about the correct dosage. Luckily, as the name implies, safeguard is very safe to give to the birds and so if you give them a little too much, it won't kill them.
I have never had any issues with bumble foot with peafowl. I can't even think of any case where I have seen someone post on this forum about a peafowl having bumble foot. I have sometimes seen one of my peafowl limping a bit and I figured they stepped on something sharp or landed on something, but by the next day they were always better. I think the only way they would get a bad foot condition is if they were living in a pen that was not cleaned and were therefore always standing in their own poop. I wouldn't worry about bumble foot. The main thing people worry about for peafowl is worms and black head.
2) When feeding peachicks, they need a medicated chick starter feed. They have to be taught to eat so pecking at their food with your finger helps teach them. If the peahen is taking care of them she will show them how to eat. Peachicks really enjoy having their medicated chick starter wet. I call it mash - I think other people call it that too. Anyways the medicated chick starter should be around 18% protein. Some say that too much protein in the feed can cause slipped tendons in the chicks, so that is why it is recommended to keep the protein around 18%. I usually feed the chicks medicated starter until they are a year old. Then I feed them what I feed the adults. Since there isn't a feed specifically made for peafowl (that I am aware of) every breeder has their own mix of feed that they give their peafowl. Some people give them game bird feed. I feed mine sunflower seeds, cat food, and various treats. An important treat is vegetables. Giving them things like lettuce, cabbage, etc is good. Since they are free-range I suspect they get a lot of good plant material anyways though. Some people just give treats to free-range peafowl since they get most of their food by foraging. Cat food, dog food, or catfish chow is an important treat to give them. It gives them good protein. My peafowl seem to like cat food the most. Dog food is their least favorite. Some people have more complex ways of feeding their peafowl. It never gets that cold here so I don't change their diet up much in the wintertime. During breeding season giving them crushed up egg shells can help give the peahens calcium to produce eggs, but usually free-range birds get a lot of good nutrients on their own.
Here is a list of treats that peafowl like:
http://bamboopeacock.com/Treats_for_Peafowl.html
3) I am not really sure about any vaccines for peafowl. Mainly at least 2 times a year everyone worms their birds. I worm my peafowl once before the breeding season, and once after.