That's great. It's nice to get ideas for new things to add.I have been doing the same for years and it works so much better than catching every bird. There is a post on our FB page complete with pictures if you want to see more. Back when I only had a hundred or so birds they used to get mash every day but making fifteen gallons of mash daily became just too much work. I have an old thread on here on how I would make it with alfalfa pellets, groats, gamebird feed, and Ultra kibble or catfish food. We would add old mushy bananas or over ripe apples or pears and peaches from our orchard and cans of mackerel on Mackerel Mondays or Fish Fridays. The process would start with a quick ferment using ACV the day before feeding. I attribute some of my best hatch years to feeding a mash as their sole diet.
How lovely to live somewhere where you can grow peaches! I was going to try some under glass this year but never got around to it. I'm going to try next year. We have apples, pears, plums and lots of berries but I'm keen to diversify our fruit and peaches are my favourite.