I have 2 strictly indoor cats. They are a year and a half old and are up to date on shots. For their health I am considering not getting them anymore shots as they are always inside. Whenever I have adopted a cat there was a lot of paperwork about vet references and whether they are up to date on shots. My question is would it make it hard for me to adopt another cat if I stop vaccinating the 2 I have now ? Do they not like to see that at the adoption places?