Does it matter which one I use?

[fuzzy9]

I've been breaking off my minerals for the rabbits from a big horse mineral block from Buckeye Nutrition, but I didn't even think to use what I already had in my barn that I use for my ponies. It's for horses, but it's a loose mineral, and not a block. Can you look at these, and tell me if there is any reason why I couldn't just use the loose minerals I already had, instead of the block? It's such a pain to break off the block, and so messy!

This is the block info. You can click to download the nutritional data. For some reason the computer I'm using isn't letting me open it.
http://www.buckeyenutrition.com/supplements/grass-plus---block.aspx

This is the loose mineral mix info.
http://www.buckeyenutrition.com/supplements/grass-plus-mineral-and-vitamin-mix.aspx

Thank you!

 

[Secuono]

You can buy 1 pound blocks instead, that's what I use, for my sheep and horses. I don't want to break a big block into three for each horse and the sheep flock.
Loose should be the same, but idk if the rabbits would eat it or end up wasting a lot of it.
=/