Automatic Litterbox Central

I'm devastated. My 4yo son has developed severe allergies to my cats. They are both 12yo.

I don't know what to do.

His allergies started about a year ago. We've been trying everything to make it so that we can all live together, but it's just gotten worse. We've used Allerpet C, shampoo with Allersearch, bought massive HEPA filters for the house, vaccuum with a Dyson.....

I can't believe this has to happen. I've been in denial about it for so long, but my son's symptoms are undeniable now. We can't do shots at this age and the meds don't really help.

How am I going to find a wonderful home for two TWELVE year old girls????