Bests & Worsts Reviews from Amazon

I have a 2 year old son. A few days ago I was asleep in my bed with my son. Husband was off to work and it was ~9am. Having worked a 16 hr shift the night before I was exhausted. I woke up to see my son still asleep next to me, so I went back to sleep. I woke up again (i don't know how long after) and he wasn't. I thought he must be in his room. He wasn't. The living room? He wasn't. The back yard, somehow? He wasn't but the fence was opened. He knows I let our dog out that door and must have opened it to let him out (how he unlocked it is beyond me for a 2 year old) He was not in our house at all. I could not find him while running up and down my block in my robe crying his name. After what felt like forever of my world slowly closing in on me, I finally saw our dog come from behind a neighbors house and along came my son chasing him holding a random object from their garden. I am now making damn sure nothing like that ever happens again. I've bought these alarms and chain locks I can put up high. I wasn't sure if these would work since my doors do not close 'flush' but with some ingenuity I was able to get them to work. They are certainly loud. I will know once anyone opens either of the doors. There is a chime option that sounds like you just walked into a store of some kind BUT MUCH LOUDER. They are small and very easy to install.