you mean Discovery Collector (sucker) or the Discory SW (pusher)? You mean with sand in lying boxes?

I would be also interested to know in how both robots do with sand

the Discovery Collector has special feature to be used with cubicles with sand beddingLely introduces manure collecting for barns with sand bedding

That's really nice! I was not aware of this 

That's really nice! I was not aware of this