We have 2 bunnies we got in the summer, they have a very large hutch off the ground with a ramp down to the attatched run. They come out for a run out in the garden every day but we have neighbours cats that I dont trust with them so dont leave them outside run unattended. The grass where the run was wasn't great even before the rabbits but now all the grass has gone & it is just mud. They have a tunnel and toys & shelter underneath the hutch so seem happy enough but the mud just looks horrible. Any ideas?