Be careful not to leave it in the rain. I bought one and put it down without thinking. Carried on with my ADHD and a few hours later it was completely gone. Just a pile of yucky mush that no one really enjoyed.
Pros - Lasts a long time and the chickens love it. Saves money on buying feed.
Cons - Falls apart as the chickens eat it, so you have piles of flock block around the original product.
I cannot praise this product enough. It is wonderful! When I bring a flock block home for my hens, they come running and follow me to the garage where I put it for them to nibble on in bad weather. The price is reasonable and it supplements the regular laying crumbles they eat.