That is very sweet to watch! Sammy was quite concerned when his new baby brother Romeo was sick. He followed him everywhere, to the potty, to the kitchen for a drink,he would lay on the floor at just watch the baby. And Sammy would always nap right next to him. If Romeo meowed in a different part of our place, Sammy would run very quickly to find Romeo to make sure he was o.k. As far as drinking out of strange places, it makes me NUTS when Sammy will hop onto the toilet seat and start drinking! I thought dogs only did that! I think it began with the fascination of watching the water swirl around after it had been flushed! Needless to say, we keep the lids down now!