So. My cat is scared of my guineapigs. I am thinking about moving there cage. He doesn't sleep in my room during the day but he will at night. Would it be ok if I covered there cage at night until he is used to them?
Sure it would be okay of you covered their cage. It is actually better your cat is scared of them as it means she will be less likely to want to attack them. I am sure she will get used to them eventually though.
Thats fine to cover their cage, providing they get enough ventilation also it will keep them warmer since its winter and temps drop at night