I dont think the vet tech has any right to tell you anything about your pet. They're not trained to do that, they are trained to take weights, records, and help somewhat but they dont need to be almighty and snotty or rude! If the cats got sick, Im sure you'd get them tested! But whats the testing gonna help now while they're healthy, they probably wouldn't do anything if they were possitive because the cats still in good health! I would be upset too. No vet tech can tell me whats best for MY cat. Ive known my cats forever, I know when there is something wrong and I bet you would too!