My prediction is you will go through most of that bag just on these four chicks. In the first few weeks they don't seem to eat much but they need to stay on this until they are about 18 weeks old and by that time their consumption will be considerably higher.
I don't have an instant pot but I have one of its predecessors. I've had it about 10 years, I think, and prior to purchase I had never heard of such a thing. Mine is just called a 4-in-1 pot and does rice, oatmeal and I can't remember the other two because I never use those. Maybe slow cooker and steamer? I have a slow cooker that I use a lot so I've never needed to use that setting on my pot, and I don't love steamed vegetables so haven't used that setting maybe but once, years ago. However I use the oatmeal and rice settings practically on a daily basis. In winter DH and I have oatmeal for breakfast many mornings and we eat a lot of meals that include rice. Prior to having this pot, I had a rice cooker and made oatmeal in a pan on the stove. This pot works about the same as the rice cooker, I suppose, but it makes oatmeal so much easier than making it on the stove. With both rice and oatmeal, I just put in the dry and wet ingredients, push a button and walk away and it does it perfectly every time. A few years after I bought this, they came out with a 7-in-1 pot, and more recently I've been hearing a lot about the Instant Pot. I don't know what they do that mine doesn't, though I hadn't heard about making soup. I bet I could do that using one of the other settings on my pot - I just have never investigated it. If mine came with a recipe book it was lost a long time ago as I don't recall having one.