What are you feeding them?
Picking can sometimes be a sign that they need more protein.
Chick starter usually has enough protein, but check the bag to be sure.
You could try offering them some scrambled egg each day, as a protein supplement.
A bit of scrambled egg will not do any harm, and might help.
Excessive heat can make picking more likely. Depending on what temperature that area is, they may not need any supplemental heat by this age. (They might, or they might not-- it depends on the temperature in that room.)
Boredom can also encourage chicks to pick at each other. It can help if you give them things to sit on, and especially things to pick at and things to scratch in. Clumps of sod often work well, and are often easy to get (just dig it up from a corner of the yard.) Dead leaves, bits of other kinds of bedding, a shovelful of compost or even dirt, leaves of lettuce, pieces of apple peel, a pinch of grit-- there are many ways to make their life more interesting. (I have a preference for things that I have available and do not need to buy specially. This is not an exhaustive list, just trying to give some ideas.)
The thing I think is most likely the main problem with your chicks:
Crowding and lack of space can encourage chicks to pick at each other. I would try to give them LOTS more space. As a rough estimate, I would aim for at least 4 times what they have there, and maybe up to 10 times as much space. Yes, I do mean those numbers literally.
Maybe you can get a giant cardboard box, or take pieces from several boxes and assemble them into a big space. Cardboard is usually pretty easy to get, and should last long enough for what you need. Then you can dispose of it at the end.
Chicks grow very quickly. If you try to keep them in that space for two more weeks, I am pretty sure you will have dead chicks.
It is much easier to make one giant space, than to separate chicks into a bunch of individual spaces and pairs, trying to keep them from picking each other. Having them all together in one big space is also better for them.
It is also easier to make a big space NOW than to deal with a bunch of problems, and make the big space next week.
Also, the longer the picking continues, the more it becomes a habit, so it is best to get it stopped as quickly as possible.
Picking can sometimes be a sign that they need more protein.
Chick starter usually has enough protein, but check the bag to be sure.
You could try offering them some scrambled egg each day, as a protein supplement.
A bit of scrambled egg will not do any harm, and might help.
Excessive heat can make picking more likely. Depending on what temperature that area is, they may not need any supplemental heat by this age. (They might, or they might not-- it depends on the temperature in that room.)
Boredom can also encourage chicks to pick at each other. It can help if you give them things to sit on, and especially things to pick at and things to scratch in. Clumps of sod often work well, and are often easy to get (just dig it up from a corner of the yard.) Dead leaves, bits of other kinds of bedding, a shovelful of compost or even dirt, leaves of lettuce, pieces of apple peel, a pinch of grit-- there are many ways to make their life more interesting. (I have a preference for things that I have available and do not need to buy specially. This is not an exhaustive list, just trying to give some ideas.)
The thing I think is most likely the main problem with your chicks:
Crowding and lack of space can encourage chicks to pick at each other. I would try to give them LOTS more space. As a rough estimate, I would aim for at least 4 times what they have there, and maybe up to 10 times as much space. Yes, I do mean those numbers literally.
Maybe you can get a giant cardboard box, or take pieces from several boxes and assemble them into a big space. Cardboard is usually pretty easy to get, and should last long enough for what you need. Then you can dispose of it at the end.
They are a little tight on space but it is because they have been in it for 3 weeks now and they are getting bigger but there coop will be here in about 2 weeks.
Chicks grow very quickly. If you try to keep them in that space for two more weeks, I am pretty sure you will have dead chicks.
It is much easier to make one giant space, than to separate chicks into a bunch of individual spaces and pairs, trying to keep them from picking each other. Having them all together in one big space is also better for them.
It is also easier to make a big space NOW than to deal with a bunch of problems, and make the big space next week.
Also, the longer the picking continues, the more it becomes a habit, so it is best to get it stopped as quickly as possible.