I never knew that about the pet's dishes. Gee, a whole new thing to worry about
I am so sorry for your losses. I do hope that you are able to find the cause in order to protect your chi and also the new puppy that I hope you are going to buy for your 14 year old son. Those are such rocky years for teen boys, he needs all the healthy companionship & love you can provide.
God bless you all.