Can food grade diatomaceous earth kill a dog if ingested? ?

Im going to treat my home with this natural product because i have found fleas not an infestation but thats what i want to prevent. I dont want to use any chemicals thats why ive chose this method. Now ive read gardeners use this natural remedie to get rid of bugs in their plants and it works very well, ive also read that its used to deworm dogs but thats not my goal i dewormed my dog already. So if you ever done this i would like your help. Please save your comments if its not answering my question and dont tell me get an exterminator because i chose not to alredy as i sai i dont want to use chemicals i dont use chemicals i use everything organic. Thanks!