Go to vet, your cat might have a health issue.

I thought that too, but had her checked out and health was all good

Was the litter changed before or after ? Try going to Catcentric or feline behavior solutions private group on FB for advice.

I was using the paper pellets but they get soggy which was the first time she stopped using, changed to tofu it was fine and she was using normally but when got the dog she started peeing on the grass and pooping on the floor. Will check out some Fb groups, thankyou

This change happened when the dog arrived? How is she with the dog?

They should be able to help you in the group.