My friend has a rabbit, and recently took 3 bunnies that she got off someone who couldn’t look after them anymore. She said they were in bad conditions. But nothing that couldn’t be treated, they just had yellow teeth and matted fur. They also said that at their previous home, they ate things like chocolate crisps etc. Accidentally but that it happened several times. They started to go limp but also they were trembling. Then day after day they started to die. She had vaccinated them against rhd2. Any advice?