Hello my rabbit is having trouble to get comfortable. I think it's just gas in his stomach but I'm not 100% sure. He can't even sit like how rabbits when they sit they have that nice "bubble" shape. When he does sit he sits like a dog. He can't even go to the bathroom. He stopped using his litter box for a few days now. It doesn't matter if it's clean or super messy he still won't use it. I'm starting to get really scared with my rabbit.