I've taken my cat for her booster jab today and I was worried her heart would give out while we were there. It's made me wonder whether I should get her booster done next year. She's not particularly old but is very timid and lives in such a way that she can choose exactly how much interaction she has with people. Most people don't know we have a cat as she'll leave the house whenever she smells anyone else come onto the property. Today at the vets she was shaking all over, her feet were sweating and her heart was pounding. I'll ask the vet the question of course, but has anyone ever just not had their cat jabbed? She does go outside, she's not an indoor cat. I wouldn't want her to pick up anything nasty, but I've never seen a cat scared like she was today.