Children and adults: Home-canned foods with a low acid content, improperly canned commercial foods, home-canned or fermented fish, herb-infused oils, baked potatoes in aluminum foil, cheese sauce, bottled garlic, foods held warm for extended periods of time.
Quick Answer. It takes up to seven hours for a cat to give birth to a litter of kittens. Once active labor begins, the first kitten normally arrives within an hour, with about 15 minutes between the birth of each kitten. As each kitten is born, the mother cat stimulates it to breathe by licking it with her rough tongue.
1 In general, try to wait until the kittens are weaned, about 6 to 8 weeks.  Even if you're hand-raising the kittens (no mother is around), you should still wait 6 to 8 weeks before giving them away. This way, you ensure they're getting proper medical treatment and socialization.