Oh boy that is a loaded question..........How long to wait?? Like many have said its mainly up to you....From experience I had to greive a very long time for my little Cilla Sue...... She was attached to me by the hip I think at times... Not having her around really bothered me but for my other kitties I really needed to give myself and them time to adjust to Pricillas presence being gone..... I think I started to look for another pet in about a month or so. I had one type of cat that I wanted to take her spot. I still to this day cry about her.....You never forget the ones you loved so dearly.... We adopted Chloe about 1 1/2 monthes later. She was a wonderful little sweetheart she was so sick when we picked her up that it took a while to get her back to health I think that was the reason I healed so well I found some peace taking care of Chloe........ Chloe is still one of the sweetest cats I have ever owned..... But she has a different personality than Pricilla had so about a year later we adopted Paris who was a Blue Point Siamese (The same as Pricilla and the same personality also) I wouldn't take back one day of Paris's personality I just love her dearly as I do all of my cats but Paris was I believe sent to us from Pricilla