I don't know if it is "better" but iv'e got much less waste with scratch and peck than crumbles. Since it is pricey iv'e been doing a 50/50 mix it seems to be working. Chickens are still spry and poops are still firm, quite happy with it.

Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
The problem with minimally processed feeds like Scratch and Peck is as @rosemarythyme mentions, that chickens (some more than others) will bill it out and pick through it for their favourite bits, usually the high carbohydrate grains and sometimes leave the less attractive pulses which are higher in protein for rodents or lower ranking birds to clean up and often the fines which contain minerals, vitamins and essential amino acids are lost/wasted in the process. I'm not totally convinced that even fermenting it will ensure a balanced diet because the components swell in size when they are fermented and should therefore make it easier to pick out their favourite bits but assuming that @rosemarythyme has been using the product in such a way for many years without encountering health issues or sudden deaths in their flock, then I can only defer to his/her experience.
https://www.scratchandpeck.com/shop/naturally-free-layer/The likelihood is that most people feed chickens ad lib in gravity feeders though and even fed as you do, there is the potential for more dominant birds to get more of the favoured bits and leave the lower pecking order birds to clean up the rest.
I'm curious to know if there are any instructions on the Scratch and Peck bag or other similar brands which recommend how best to feed it or warn against feeding ad lib in a gravity feeder?
"It’s scratch feed if you feed it by scattering it on the ground " http://www.plamondon.com/wp/scratch-feed-chickens/The likelihood is that most people feed chickens ad lib in gravity feeders though and even fed as you do, there is the potential for more dominant birds to get more of the favoured bits and leave the lower pecking order birds to clean up the rest.
I'm curious to know if there are any instructions on the Scratch and Peck bag or other similar brands which recommend how best to feed it or warn against feeding ad lib in a gravity feeder?
OP is not talking about feeding scratch here. She is talking about the brand name Scratch n Peck. Completely different things."It’s scratch feed if you feed it by scattering it on the ground " http://www.plamondon.com/wp/scratch-feed-chickens/
Throwing whole grain out on the ground is how you feed scratch grainsBecause it won't dissolve like crumbles or pellets you can just throw it out over a large enough area to make sure every bird has a good chance to get some. We currently have 70 plus chickens and chicks but have had as many as 150. We feed nothing but a grain scratch that has sunflower seeds in it and we add a little extra sunflower to boost protein. I have recently started fermenting about 1/2 their feed. For chicks I run the whole grain through the blender. Been doing this for years. Get lots of eggs. Raise healthy chicks. Have lots of healthy chickens. Lots of misinformation about feeding chickens out on the web. Proof is in the pudding. Scratch feed is just fine for chickens and IMO better than pellets or crumbles. You don't really know what all is in there. Probably lots of the info is propaganda by the feed companies that then gets repeated by people who have never tried anything different. Picture of one of this year's chicks raised on nothing but scratchView attachment 1457086
The problem with minimally processed feeds like Scratch and Peck is as @rosemarythyme mentions, that chickens (some more than others) will bill it out and pick through it for their favourite bits, usually the high carbohydrate grains and sometimes leave the less attractive pulses which are higher in protein for rodents or lower ranking birds to clean up and often the fines which contain minerals, vitamins and essential amino acids are lost/wasted in the process. I'm not totally convinced that even fermenting it will ensure a balanced diet because the components swell in size when they are fermented and should therefore make it easier to pick out their favourite bits but assuming that @rosemarythyme has been using the product in such a way for many years without encountering health issues or sudden deaths in their flock, then I can only defer to his/her experience.
There are a number of posts here on BYC about birds that have died suddenly from Fatty Liver Haemorrhagic Syndrome at 1+years old and it is strongly believed that such feeds, along with a genetic disposition, are responsible. Birds that are penned and therefore get limited exercise will also be more at risk with such a feed. Heavier birds like Orpingtons, Sussex, Brahmas etc will be more prone to Fatty liver Disease. The disease is common with pet birds too I am told like parrots that are kept caged and fed a mixed seed diet. The build up of fat in the abdomen can also lead to laying problems like prolapse and salpingitis and internal laying, all of which can be fatal. It can almost equate to feeding your chickens scratch each day.
There is also much more waste with these type of feeds because the birds naturally want to rifle through it to find their favourite bits and they bill it out of the feeder to do so and scratch it around on the ground, as compared to a processed feed where it is homogenous and therefore no point in billing it out so they just eat it.
I appreciate why you might want to feed one of these feeds but be aware that they are expensive, there can be a quite a bit of waste because of the instinct to bill it out to find their favourite bits, they may attract rodents due to the spillage and they may actually be less healthy for your chickens than a more processed feed. You have to remember that a natural diet is fine for a wild bird, but chickens usually roam over a limited area and their bodies have been selectively bred to produce an unnatural number of eggs. These factors make dietary requirements really important. Like a top level athlete their bodies are working at optimum production but like children, if you give them a free choice they will often eat the goodies and not get a balanced diet and feeds like this allow that. I would certainly urge you to at least soak or ferment if you are using these feeds.
I encourage people to test my argument by placing some Scratch and Peck on a hard surface and watching which components they eat first and what is left when they are finished and then remember that this food billed out onto the ground under the feeder is not so easily visible or cleaned up. Spillage under the feeder can also grow mould in damp climates and that poses other health risks.
I'm not saying don't use these feeds (although I personally would not) but be aware of the risks/issues and balance that against your goals and ideals and monitor your chickens closely for any indication they are carrying too much fat. Feathers can hide a lot and many people are used to seeing supermarket chickens which are plump and do not realise that laying birds should not be like that.
I wish you luck with your flock whatever you decide.