Yeah, so, what @Keteriya said; you can ask. Start with Papa Legba, he will advise you. If he comes; they can be intractable, but I like him a lot all the same.
I said I would not work with the Loa unless they approached me, and a few months later he did. I am very circumspect about who I deal with, this is MY world and I will not concede on my principles, these are part of my power, and I’m not bending he knee to a entity that wants anything I don’t want to give, doesn’t matter what or who it is. I pretty much just stick to Papa Legba and the Baron
I’ve also explained on this forum that the Earths changing energy into the Age of Aquarius all but invalidates animal death as a “sacrifice” - it’s merely a blood offering because in 5D you no longer have the right to sacrifice another being. The energy is much reduced and my feeling is, it messes up spells that rely on that.
Ok, drop from Papa Legba (untested by me, just honouring the contact…)
There are ways to piggyback on serendipitous death to divert the energy to the Loa for use. But, if you go that route, the Loa can start having things killed in front of you so you do that.
Back to me: yay, that means they’ll manipulate you, if you start that, see, they’re tricksy!
So, that doesn’t stop entities loving and wanting to feed on the pain, fear and blood. Which is where it is still valid as an offering.
So the question becomes, what else can you negotiate with them to get the work done? You’ll have to ask, but let Papa Legba guide you and tell him your asks, if he thinks you’ll offend, he just won’t introduce you and save you both the trouble. Unless you make him mad.
If they won’t accept anything else, then you have to make the choice to bend your will to theirs, (which I think is soft as shit, since they need you more than you need them) or tell them “no thanks” and get what you want done another way - which is always possible for a human. The ones that are that way inclined usually laugh at me for that, which is fine I don’t care, no deal, here’s thousands of others that want to chat.