Re: Laminate/Bamboo over existing Laminate/Tile?
First, dogs and hardwood don't mix well, their nails scratch the flooring.
Second, by the time you make the entire floor flush with the kitchen area, you'll be into as much time and more expense than just removing the kitchen tile. Another problem with this idea is clearances at doors and thresholds with the thicker flooring.
I say, if you're ok with the existing floors, just demo the kitchen tile. If you're on a raised foundation, it will be easier than if on slab, though removal from slabs isn't impossible either. Then, either match the hardwood for the kitchen to the rest of the house OR choose a complimentary color and let the kitchen be an "island". Another option would be to pull the tile AND the existing hardwood and install whatever flooring appeals to you.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!