My Tigger had that cold and it really put her under the weather. She wouldn't eat for about 2 days, and she only drank a little. I took her to the vet, worried she was dying, but she just needed a bag of subq fluids. Today she was really congested this morning, but is much better now. She's eaten several times, and is sitting by me purring. Whew! I was concerned because she is 19.