Out natural ear drops are safe for kids and for dogs. 
Why?
Oregano oil 
Outer Ear Infections
As an anti-septic, Oregano Oil may prevent the growth of an established infection. Applied topically, it destroys all pathogens on contact. Additionally, the oil has a softening effect on ear wax, aiding the natural expulsion process.
A study from 2011 included in vitro tests of oregano oil, which showed that it had antiviral capabilities.
These effects are primarily due to a component in the oil called carvacrol.