I did a search on this site for "peas" but came up with threads on peafowl. So I came to this thread because it was the closest I could find to the subject on what chickens can and cannot/should not eat. Very amusing. Now, since I cannot find any "no-no" on peas, I guess it is okay to feed my hens raw peas. They had been in the freezer a long time and wouldn't be at their best-tasting condition. I gave my six girls a cup of thawed peas, mixed in with their evening scratch treat (giving a cottage cheese container full of scratch a few hours before roosting time since it has been extremely cold and temperatures are often in the single digits during the night and early morning). They picked the peas out like they were candy. Since they are a legume, I thought they should be okay. I will check the Merck site to be sure.
I also give them half a cup of plain yogurt with 2 cups of layer pellets, occasionally. Foods that some people recommend, that my girls turn their noses up at, are: cantaloupe, watermelon, lettuce, and a cup of stale honeynut cheerios. I thought they'd love the cheerios but nothing has touched them, not even my two dogs. My hens do go bonkers for worms, grubs, spiders and grasshoppers (just not very many of spiders around this time of year and of course, NO grasshoppers or crickets or moths--all are favorites). Worms and grubs are very scarce, too. The girls have eaten MANY a brown recluse, as our shop was overrun with them before we got chickens. They love mealworms and BOSS. They don't get a treat everyday, but a couple of times a week, for sure. I haven't tried pumpkins, yet. They didn't eat apple, but I just remembered they finally discovered tomatoes and we had to fence off our little garden bed because of that.
(Edited: I found Michael Apple's post, regarding BYC's article on treats. Peas is on the list and okay. )
To add to the previous discussion on "toxic" foods, I choose to err on the side of caution. It is difficult to know how certain foods will affect the kidneys and liver until it is too late. My brother had a pet squirrel and one day fed it a couple sections of orange. He found out the hard way that citrus will shut down a squirrels kidneys.
I haven't checked to see if there is anything in the forum on toads. This last summer, we had an overabundance of rain (two or three years of drought) and the toad and frog population exploded. There really wasn't anything I could do to keep the hens from eating them. Even if I had kept the girls in their run, toads and frogs would have found their way in, there were THAT many. Whenever I could, I'd catch them and get them out of the yard, mainly for the sake of the little toad/frog. We haven't had many since 2009. One reason was the drought. The other was because of the yorkie mix that we rescued. She had chased off the few remaining toads. Try as we may, we could not break her from messing with them. With the chickens eating so many little toads, we wondered how that would affect the eggs. They were still tasty and we didn't suffer from any foaming at the mouth or hallucinations.