Not sure if you are completely in the legal right right all the way around but that doesn't seem to be part of the issue. Obviously your brother was in the wrong for letting the dog run free and destroy your property and eat your chickens. Hard to say this, but you need to meet his attitude...
I guess that one of my issues is that the coop we built was for 3 chickens and it is pretty small. About 3 feet square. I can make it taller, or lower to the ground, (more multilevel) but if this is not enough room for 3 adult chickens, maybe a freezer would be a better alternative than...
I live in SE MN and this year we got 3 chicks. (Wyndatte, Sex Link, and Orpington) They are winter hardy varieties but I do want to keep them comfortable in winter. I know that they need good ventilation. We built a coop but it is a bit drafty (Ok in spring and summer and fall) but for WINTER I...