I looked around for blue cats on Saturday's field trip... but didn't see any. I did, however, find a guinness and beef pie. Don't worry, I took care of it.

"In a story of young St. Ciaran, he was told to leave the house while his mother dyed some cloth (it was concidered unlucky for a male person to be in a dying house). He left in a childish pout and wished the cloth to have a grey stripe in it. Twice the cloth was re-dyed to correct the blemish. Finally his mother asked her son to bless the dye pot and the cloth was dipped a third time. This time the cloth came out an intense blue and what remained of the colouring liquor in the pot, afterwards "made blue all the dogs and the cats and the trees that it touched." [source]