I use a dust pan and brush on the carpet due to our beloved pup getting into the litter tray in the bathroom and insisting on flicking the litter off the poo in the hallway before she eats it

There's a knack to getting the litter off carpet you have to do it gently while fighting the dog and cat who are attacking the brush

I have a black and decker DustBuster and it works fine for me for picking litter off both hard floor and carpet...it tends to get clogged with cat hair v quick but equally it is really easy to empty/clean...so I'm happy with it

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I've got one of them battery powered dysons with the motorized bush , no bending down and its a fantastic vac , I couldn't live with out it