Using
this source to estimate the weight of each of your feed's measurements, I calculated the nutrition profile of your feed because I suspected it was significantly high in fat for what the chickens need, and I was right. Laying hens need roughly 16-18% protein and only 4% fat in their diet to be at an ideal body weight and to optimally lay eggs.
Your feed comes in at 15.8% protein (a little low, but acceptable), and 11% fat, which is
way too high for chickens, regardless if they are for meat or egg laying. Of course, if you want to measure and weigh your feed ingredients I can be a little more accurate.
This is why it is critical to use preformulated feed, as it is optimized for chickens, not some internet blogger/google warrior's recipe. Yes, I know you say your hens are healthy, but an unhealthy diet isn't an instant death sentences, the affects range over time, much like they do in any animal or human that eats an unhealthy diet.