Your cat is expressing his displeasure with the addition of two dog's to his home. by marking his territory. Did you do a gradual and proper into of the dogs to your cats? If you haven't done this yet, do it now in a gradual way. Then after this is done, and your cat is still peeing about, then deal with that by additional litter boxes, and some Dr. Elsey's Cat Attract litter. Here's a link that I hope you find helpful.
"There are no ordinary cats.";"Time spent with a cat is never wasted."~ Colette
"A loving cat can mend a wounded heart." ~ Unknown Author
Alkitotle aka "Alkee", "Lambie" (July 2/04 - Oct. 2/15) -- white Devon Rex
in avatar. "Always in my heart."