We adopted our first cats, one year old rescue females) last month. Tonight the DCs found one of them throwing up, she had also just done a soft (semi liquid) poo in her litter tray. One of them threw up on Sunday as well and we didn't know which one. They have both been behaving normally and have not been out of the house since they came here. I will ring the vet tomorrow I think.
It has occurred to me that I really don't know that much about cat health or the vet system - for example the out of hours system. Perhaps some of you could list the things that would make you call the vet a) immediately or b) the next day?