Actually you can try giving it a mouse hopper. If it doesn't take it you can either try assist feeding it a prey item or there is a product called Oxbow Carnivore Care which is a dry powder mix that is made specifically for getting protein into an animal that is not eating. You just add water and it creates a slurry that could be injected into there mouth just with a syringe that has no needle. You can find it on Amazon for about $10. We used it when my daughters Hoggy was in pretty bad shape and didn't have the strength or the inclination to eat. Had we not used it I don't think she'd have survived.