Hope your pup’s gift wasn’t a reaction to your volume Reminds me of when our son-in-law got a new single cut guitar and had it in the floor rack with his other guitars. His Bernese Mountain dog walked by and with a single wag of her tail knocked all the instruments out of the rack. Big gouge to new single cut—ouch.
Sounds like the surface will need disinfection more than cleaning. Here’s a couple of links:
https://www.hunker.com/13421562/how-to-clean-urine-feces (except I would not use a sprayer)
Use a vacuum to first clean the surface of the pedal; do the same for all of the jacks. Be careful not to allow the nozzle or brush to scratch the surface plastic or silk screen lettering.
Use rubbing alcohol and Q-tips to gently clean all of the nooks and crannies. If there’s any fecal matter still on the surface around the switches, allow them to completely dry and then use a can of compressed air to blow out any debris.
Before you use any cleaning or disinfectant solutions, be sure to test them on an inconspicuous spot. You don’t want the solution to damage the silkscreen lettering or anything like that.
Let us know what you tried and how it turned out.