My husband and I are going to Italy for 9 days. May 23-May 31. I am terribly worried about leaving my kitties for that long. We do have people coming over to change the water/food and scoop the boxes, but I'm nervous anyway. Do you think a Feliway diffuser would be a good investment for when we leave? I know that it's supposed to comfort cats in stressful situations. This certainly qualifies. I'm most worried because I have a cat that blocked in December and I'm afraid the stress might bring it on again. Thanks for your opinions.