We got two new 8 week old kittens from a reputable cat refuge last saturday. Siblings, a boy and girl. Recently spayed/neutered. They've been fine so far but two days ago one of the cats started to have slightly runny poo. Otherwise he's quite full of beans and is eating loads. Today though I came back from work to find that both kittens were having runny poo (each has different coloured poo if that of any interest). They then started looking really fragile and lethargic - just clinging to whoever sits down long enough. The female cat then started being sick. First she emptied the entire contents of her stomach (she'd been eating well until early evening), since then she's had a couple of episodes of retching and bringing up mucus.
I've never had a cat before so not sure if I should panic and drive across London to find a 24 hour vet, or just take them in the morning. wwyd?
I'm not so worried about the male cat, who seems quite perky. It's the female cat who can't face food and barely wants to move. Might she need to be on a drip?