8 in 1's mineral treats for birds are one of the better bargains for providing extra calcium and helping keeps the bird's beaks trimmed. The 2 pieces of wire on the back are a tad flimsy for hanging and if you have a persistent bird,they can easily pull the treat loose.
The price is reasonable and they are usually easy to find in most stores carrying pet supply items.

Pros: reasonable price;the birds seem to like it

Cons: hanger on the back is flimsy