Last night one of our cats spit up about a tablespoon or more of a foamy, mucus consistency vomit. This is maybe the 3rd time he's done this in the past few weeks. No food or fur at all in the vomit. Anyone ever experience this? It's not really uncommon for the cats to puke but this one was just odd. All 3 are free fed Nutro Max Cat roasted chicken. Thanks!