Kandi is continuing to do much better, but Gizmo suddenly started the exact same symptoms around 9pm, so we rushed him to the ER vet. They also checked Kandi out again, and she's continuing to improve. The vet at the ER went through a list of our medications and looked all of the symptoms up.
Well, her research all pointed to them getting hold of one of John's Fentanyl patches. It's for his chronic, severe pain issues. He is always very careful to flush his used patches, but this time he didn't. He was in a hurry and just threw it in the trash.
We still weren't sure until we got home and searched the house. We found a patch that had doggie chew marks on it under the bed. John feels terrible, but with his chronic pain and fatigue, I completely understand.
The ER vet treated Gizmo with fluids under his skin and atropin (like they did for Kandi). He's tired, but doing better now. We don't know why it took him six hours longer than Kandi to show symptoms, except that he weighs several pounds more than she does.
Whew....at least we have the answer now. So, the moral of this story is that if you know anyone who uses medication administered through patches, watch out! Their is still enough medication on a used patch to poison your pets.
Thank you all for your prayers and support. I'll update again in the morning.