Mix dry ingredients first then slowly add to wet as the vinegar and baking soda will react slightly. Put into spray bottle and spray pets down. Be careful not to get in pets eyes.
Use Borax throughout the house, sprinkle it on the carpets and let sit for a few hours, then vacuum. This should kill all the fleas and ticks in your home and on your pets.
* It is safe for any animal, apple cider vinegar has a shelf life of about 3-5 years so you'd be fine to store it for a long time, just keep it out of direct sunlight and it shouldn't spoil. As for application, if your pet if flea and tick free then once a week, or after every bath. If they're infested, spray every couple days until infestation is gone, then do maintenance spraying of once a week or after every bath.