So I work nights, last night eating dinner and getting ready to go into work and a smoke detector starts chirping a low battery alert. Tear apart the house searching for a 9 volt battery and there's none to be found. My dog turns into extreme velcro puppy.

No time to go to the store to get batteries, can't leave them chirping all night while I'm at work and the dog's in the house, so pull batteries on all of the detectors in the house and it's still chirping. Flip circuit breakers in the garage and it finally stops.

Come back into the house and can't find Bandit. Go to take a shower and he's hiding behind the shower curtain in the bathtub. Get him out of there and he curls up in a ball back in the corner of my closet and will not come out.

Buy batteries on the way home this morning. Come home and he's cruising around the house. Replace all the batteries, flip the circuit breakers back on, one chirp and Bandit's back in the closet and refuses to come out even for his breakfast.

So yes, my bad ass Karelian Bear Dog who's bit a moose in the nose, treed a black bear in the backyard, literally scared the shit out of a black bear in the driveway is absolutely terrified of a chirping smoke detector.

Or maybe he just needs to come out of the closet...

I went to the wired power nest smoke and co2 detectors because I got tired of that crap. They test themselves every month and just give off a few chirps during testing. You get a push notification on your phone/tablet before the test and after the test is complete. One of the best home automation solutions I have implemented.

Sorry to hear about the k9. Their ears are extremely sensitive just like their nose and certain frequencies annoy the shit out of them or scare them to death.

My detectors are hard wired with battery back up. What I didn't know was when a battery becomes weak it chirps just like battery units. Sometimes one will only chirp for a day or less before it goes full on, and when one goes off, they all go off. The last 2 times this occurred was in the middle of the night and the shrieks from all detectors going off at the same time were deafening. The dog went crazy and Barb knocked the bedside lamp off trying to turn it on. So that was it for me. I now have one functioning detector which is in the living area at the bottom of the steps. The ones in each of the 3 bedrooms and up hall have been disabled.

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My detectors are hard wired with battery back up.

Mine too but I have an automatic whole house generator so the batteries are never powering for longer than 10 seconds. Must be an inefficient battery circuit as the batteries don't last any longer than before I had the generator installed.

I've not lost power but the batteries drain regardless.

I had assumed the detector would operate from AC and AC would also keep the battery charged up, only to be used if AC is lost. But that's not how mine worked.

Check the dates on the detectors as well. After 10 years they are no good and will chirp to alert you of that. It's usually 3 chirps in a row but it could vary depending on the model.

When I was an active firefighter we used to encourage people to change their smoke detector battery's when they changed their clocks, once for spring ahead and once for spring behind.

Now I think they sell units that come with a battery that can't be changed but are only good for a certain number of years.

When my wife and I were going on cruises every six months I would change anything that took a battery before we left so our friend who takes care of our house did not have to try to find batteries at 3 in the morning.

I had one dog poor who was so freaked out by smoke alarms that I had to let her outside every time I turned on the oven. She would run frantically through the house every time she smelled it heating up, remembering that one time there was something greasy that smoked and set it off.

I don't think the dog is terrified as much as the high frequency is painful for their ears. No one is going to say you're terrified if you don't have any hearing protection and you put your hand over your ears when someone starts blasting a 44 magnum in the next lane.

We're hard wired and twice in 19 years they have gone off. We had to call it in to be safe, FD came but didn't find anything. We recently installed all new ones, still a PIA to change batteries, we have a couple that are really high, tough to reach.

When changing batteries my dog heads out and goes far away in yard. It's the high pitch that gets them.