The SS and Nazis at the camps were fed like kings, the Jews were fed with 25g of bread and 100ml of fluid.
Bulgaria fought with the Nazis invading Greece in 1940 and the Soviet Union in 1941 with the Germans.
Hitler never took over Bulgaria. Bulgarian government at that time entered to some tie with Hitler's Germany
Bulgaria was self ruled with Monarchy and Parliament. When The Nazis came into power and Bulgaria became part of the Axis powers they were not completely dedicated to the Nazi causes or invasions of other countries. The story is long and complex so I am giving you a link below where you can read about Bulgaria in World War 2.
They fed some, those who were in the camps, but they did not feed them enough to sustain life.
Croatia, Slovakia and Bulgaria were active allies of Nazi Germany. Nazi hostility to the speakers of Slavonic languages was very flexible.
The Nazis fed them very little food. ex: One loaf of bread for every eight days. if they got sick they sent them to the infirmery Aka a pitch black room
Italy, Japan on paper, Romania, Hungary, Czechoslovakia, Yugoslavia, Bulgaria, Finland, not all of them for the whole time, I'm sure that i have forgotten some.
That's a fairly complicated question, that would probably take more than several pages to answer, however the most commonly held theory in Bulgaria today is that King (Czar) Boris decided that it was safer for his people and country to join Germany on paper (no Bulgarian military ever fought on the side of the Nazis) than to follow the fate of Poland of other Slavic countries. Bulgaria had very few (if any casualties) from the Nazis and saved most of it's jewish population from being sent to concentration camps. Interesting fact: Towards the end of the war, Bulgaria fought Germany.
Allied forces invaded Europe and the Nazis had to retreat and desert the concentration camps us troops fed and cared for the prisoners
Bulgaria became Bulgaria in the year 681.
Bulgaria in Spanish is Bulgaria, or Republica de Bulgaria.