Had my cat for about a year- adult rescue now a house cat as he's partially blind.
He had a dodgy stomach til Christmas but that's finally got sorted. I don't know if he was a bit dehydrated due to his diarrhoea, but he used to use his litter tray fine.
Now, he's become very fussy. We use wood pellets so they can biodegrade and he has 2 trays. He's happy to poo on one, but he doesn't seem to like weeing on the other, unless it's a very thin layer, and then he gets his paws wet and treads it around. If it's wet at all he won't use it again and wees on the floor next to it. If it's too deep he won't use it.
I've bought some katkin clumping stuff but he won't touch it. He currently has a selection of trays with various amounts of wood peelet/katkin on its own and mixed and he left a huge puddle on the floor.
Help!! The skirting board is getting saturated!
Pic of a grumpy cat attached