yep. well i thought i woul dtry it cos 1 particular member (not naming any names but she isnt on here anymore) wasnt happy with my using gerty so i tried her suggestion for a week and they peed in it several times LOL. so i now use burgess guniea pig mix.
Mine like both ! I prefere pellets as there's less waste,with the mix they do pick out their favourite bits. They seem quite happy on pets at home mix suprisingly enough!
(better add they do have fresh veg /readi grass and hay every day....!)