Disclaimer: this is not a Halachic question and I didn't research much yet.
There's a whole subject of having wrong thoughts when bringing a sacrifice and performing numerous actions by the owner or a Cohen. Some are so severe they invalidate the sacrifice. E.g. the beginning of Zvochim (1.1):
All offerings that were slaughtered not for their own sake, i.e., during the slaughtering the slaughterer’s intent was to sacrifice a different offering, are fit, ... But these offerings did not satisfy the obligation of the owner, who is therefore required to bring another offering.
I thought that since all the offerings are explicit Mitzvas (AFAIK), don't they require saying a Brocho {on every action - slaughtering, accepting blood, etc) so we all be sure that the thoughts/intents were appropriate?
