We have a four year old cat and just got a kitten. Our older cat is not happy with us that we brought a cat home. We tried introducing them slowly, and I have tried to keep the kitten more contained so the older cat can have space but that's been difficult. I wouldn't normally worry but my older cat hasn't had anything to eat or drink (if so minimal) and has for sure not used the bathroom in about 24 hours. I'm not sure if this was the right thing to do but I moved my older cats litter box by her in our bedroom where she is hiding. She has yet to go, but not sure what else I should be doing. I know she is just ticked off but when should I worry? Any tips?