I may be freaking out for nothing, but I was wondering if anyone can help me understand...Luigi vomited this morning for the first time ever. He woke up, went potty, and started heaving a little then vomited some frothy, white stuff (best way I can describe it is it looked like frothy spit). There was no food in the vomit, and it was a very small amount (like the size of a quarter coin or less). He's acting normal as always. I switched his food from Eukaneuba to Canidae the other day, and am gradually transitioning (he likes the Canidae more though

). His poop's been a little runny, sometimes very diarrhea-ish lately, but it keeps transitioning from runny to a little more formed (but still very,very soft). Just wondering if anyone had any advice for me? Thanks!