Cutting a big round bale.

I was talking with a cousin of mine a while back about cutting big round bales. 

 

Our thinking was that, if you could slice a big round appropriately, you could reduce wastage by having smaller "bites" of hay.  I'm thinking of a post-baling crop cutter.  

 

I tried using a reciprocating saw with a 12" wood blade--didn't work very well.

 

My questions: 

 

What have you used to cut big round bales? (He thought a chainsaw might work.)

 

Has anyone used a BR baler with crop cutter?  How'd it work?  Wastage?  Tractor horsepower? 

 

Thanks.

 

Ralph

Cutting a big round bale.