I didnt really notice a huge difference going from one to two... they had some issues at the beginning but got over it pretty quickly. You still have to feed, water, change wee wee pads or walk, etc... you dont notice that you are doing it for two as opposed to one. The only time I notice a difference is on bath day although its still not bad. My pocketbook notices it a little more, they cant share clothes because one is a boy and one is a girl, my second had some medical issues which contributed to high vet bills, and the groomer costs double now... but all that is worth the big reward... DOUBLE THE KISSES AND SNUGGLES!