I have a question about what happens when dogs/cats and poison ivy are
combined. BRBR

From my own limited experience, I can tell you that in general, dogs are
protected by their hair. If a short-haired dog contacts poison ivy with his
hairless belly, he will get a mild rash. The bigger danger is letting your dog
run around in poison ivy and then touching him while the active chemical (I
forget how to spell it) is still fresh. You should ask your Poison Control
Center about this.
I never let my cat run loose anyway.
Bottom line: why let your dog run around where you know there is poison ivy?
Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)