Do you hate it when the pet store clerk...?

I went to a pet store last night to buy a toy for my 6 month old and the clerk talked me into buying a different brand of food for her. Well I knew full well that the brand I already use is just fine and healthy and a very good brand but stupid me I let her talk me into it..thinking mabey it might be better. Well my poor kitty just pucked!! All her food she just ate came right up.It makes me mad when I let people talk me into thinks like that..Purina Kitten Chow is the brand my kitten eats and shes happy and healthy(not right at the moment) Blue Seal was the brand I bought and it made her sick..I'm not saying its not a good brand but its not the brand for my Sofee..Anyone out there as gullible or easy to pursuade as me?