Aw I am so sorry for your loss

. Iq air works amazing for us. We have a neighbor who burns trash and the Iq air takes out any vocs that come through the cracks. I also have a humidifier that is on during the winter for the birds. My Older OWA needs the humidifier. I'll mist colloidal silver in the air every once in a while as a prevented measure for any ailments . Hope this helps.
Some people use essential oils in their humidifiers ( I do not because I havent done enough research for my humidifier but I do put a drop into my cleaning spray bottle for floors and counters- certain oils kills bacteria ) there is a bird group for essential oils and an avian vet who uses essential oils in Colorado- I have one ofn his book- HOLISTIC CARE of BIRDS
You have to be very selective in essential oils as it has to be 100% organic and pure and third party tested.