Weed and feeds are a stupoid concept, and something that also isn't very effective. Most weeds will only become unhappy after one treatment, but not die. It's silly to try to combine a fertilization program into a weed control program anyway. Other than crabgrass preventers like penidmethalin (Scott's halts) or prodiamine (Barricade) only these kinds of pre-emergent herbicides can be effectivley used as combo weed control fert applications.
It is smarter, more effective and in some ways safer to spot spray for weeds, and use straight fert instead. Some of the "organic-eccentrics" like to make weed killers out to be unsafe. In most cases, hey are quite safe, and most are labeled as safe to re-enter the treated area as soon as the sprayed herbicide has dried, and that isn't 24 hours. Roundup, active ingredeint glyphosate has been the target of the organis for a long time, but the stuff is as safe as it can get, it breaks down an enzyme ONLY found in plant materials. The LD50 as tested by the FDA is very low (lethal dose 50 percent kill of test population). Glyphosate ia about as toxic as 14% acedic acid... table vinegar. Plus it's half life is 3 months, although some studies say 1 month.
These 3 way herbicides, most listing the first AI (active ingredient) as 2,4-D is also pretty freakin safe. That would be the Weed be Gones (Ortho) and the bayer and Spectracide lawn weed killers. usually, it takes two sprayings 7 to 10 days apart to kill common stuff like clover and dandelions, and you can;t do that with as single weed and feed fert application.
Media hype has convinced people that "organics" are safer, but not true. Merit, the grub killing insecticide is organic... nicotine is the active ingredient. That doesn't make it safe, it's even restricted on LI NY because of how toxic it is. Organic does not equal safe any more than man made equals harmful. Media hype, tree hugging extremism.
Now, insecticides are a different issue. They are poisons, and must be treated as such. In the case of insect cotrols, it's always better to try to use an organic solution. Use poison as a worst case scenario tool. Many organic IPM (Integrated Pest Management) approaches can work, especially in the veggie garden.
Rant over. I am a retired landscaper with a NYS DEC (Department of Environmental Conservation) Pesticide Certification. Credentials might matter to some. Point is, I spent a good part of my life using both man made and organic pest controls. You can't kill ants without poison. Corn gluten meal is a joke. Herbicides work, and when applied responsibly are effective and safe. I'm sure some organic is gonna rail now... go ahead.
PS: As far as pets and kids go, what I said here is fact... the unknown variable is allergies. Some kids can get deathly ill from eating a peanut... some animals and kids can have reactions to almost anything, including man made materials and even organics. Bear that in mind.