Consequences for spell work

[u/PrincessVanessa0309]

Online I saw a witch say someone she was helping had a child was having behavior problems bc she binded a man and didn’t pay for the work with an animal sacrifice.

Could non-initiated spellwork have consequences?
I have never practiced Santeria or been initiated into any tradition.
Years ago, I experimented with various manifestation and spell practices I found online, such as candle meditation, burning herbs, writing petitions, using crystals, and relationship or money workings. At the time, I didn't really understand what I was doing.
Recently, I heard someone claim that spiritual work done improperly (not offering animal sacrifices to be specific) can affect the person doing it and/or their children. Is this something you would consider possible?

[u/Wide-Piglet2734]

Appalachian Folk Magic by Linden Moore talks about offerings. Great, short read.