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.
Now your pregnant cat will start to have major contractions. She will be breathing deeply and you will see visible movement and shuddering of her belly. In the beginning, the contractions for cats giving birth to kittens may be once every 30 minutes and possibly longer. They gradually become more frequent and occur every 30 seconds until right before the birth of the first kitten.