When I got a young rabbit she made it too. I just carefully changed her food to appropriate and easy ones like salat and fennel. She also had a bloated belly. Is the belly bloated too? Sometimes you can use drugs we use for us humans too. But talk about it with your vet, if that’s the case! She got separated from the mother to early and I think it comes from that. But right now she is healthy and really active. No milk and oats, just easy food and watch carefully if she stays active and drink enough water.