so I've had cats forever, inside-outside mostly. for the first time I've got actual barn cats... the place we moved to has 4. I've been providing them with a little supplemental feed (dry kibble, what they'll eat in one sitting) in hopes of keeping them healthy, on the property, and where I can check them for injuries and health care needs, but not so much that they stop hunting. they're looking a lot sleeker and shinier than when I got here 3 months ago, so I know they're eating better than they were. so here are my barn-cat questions: 1) is one meal a day an appropriate amount of food? too much? too little? or do I need to feed them less to keep them hunting? 2) we're in SW MO, so we'll have snow and ice this winter. we've got a nice dry barn, with hay. other than that, will they need more shelter this winter? 3) I'm going to catch them for shots, a health check up and to get the two toms fixed (they fight a LOT)... and find out if the girls are preggers... other than getting them fixed and shots, and maybe worming, any other health issues particular to barn cats?