I found this link while doing research on worming. I wanted to know what is a good safe worm medicine for my Mom cat and her babies. It says that they can be wormed at 3 weeks of age. Can I worm mom as well?
http://www.propacpetfood.com/international/images/winter2003_intl.pdf#search='deworming kittens'
http://www.propacpetfood.com/international/images/winter2003_intl.pdf#search='deworming kittens'