animal abuse & unsupported SO ** LONG STORY***

Samantha
So I recently found out by my partners aunt that her daughter boyfriend & friend abuse the dog they have in their apartment. The friend of the boyfriend lives in her home with her 4 childre who also hit that dog for no apparent reason. The aunt has witnessed first hand the abuse & has not reported it for unknown reasons. I was made aware of this abuse on thanksgiving day & she went in depth of what has happened to the dog. They did not feed that dog for the week of thanksgiving, also in the past her son in law would beat the dog where you could see visible lumps on his skin. The beatings were so bad that he would bleed from his mouth & even sometimes his genitals. There was another incident where the son in law stuck a pencil up the poor dogs butt, for reasons I do not know. So my partners mother said I shpuld report the cousin but my SO doesn't want me to get involved because we have a baby fue in two months. I don't see how thats a reason to not report abuse when it should be reported regardless. He told me I am a trouble maker for wanting to call the cops on them & report whats going on down there. But he is one to talk about how he feels bad for the dog but doesn't wanna take part on filing a report with me. So I left it alone because it has been causing a lot of friction between us & I feel so pushed away by his uncaring nature I don't even wanna stress to him anymore about doing this with me. So today when I go downstairs to head to work I feel the free loader friend who has no job walking the dog, the dog isn't friendly but won't bite anyone he only barks. So the boy smacked the dog in the face so hard he cried out loud from it!! I got so pissed off I told him you shouldn't hit that dog its not right. So this idiot told me " oh he is a big dog he can handle it." What the actual fuck nobody asked if the dog was big or anything you shouldn't be hitting that dog all because he barks he's a dog he won't understand why he is being punished for something he naturally does to everyone. So that legit made my blood boil so I went on the humane society to get information on reporting them, & the website states that I have to provide my contact information & where I live. I'm scared they will tell the cousin I was the one who reported them, I want to report them anonymously just to stay put of drama. But once I told him I was going to report them he got furious & told me to mind my business & why do I care so much about a damn dog. Like are you kidding me thats a living thing just like us, you would report child abuse if you was aware of it so why you don't care for a animal ?!? I'm really torn inside I legit cried my whole way to work feeling horrible inside, & unsupported by someone who should support my views. I'm not trying to start trouble but if they don't care about that dog give it to someone else or even me ! But my partner is a man who hates conflict he wants to stay out of everything & I hate that it's like he has no voice or stands up for nothing. I know he wouldn't even stand up for himself because I am the only one who does, so yeah why would he care to stand with me & get that dog help. I'm upset at his aunt too for she has been aware of this issue & chooses not to do shit about it. I know if I report them they will know it is me after me telling that bum who lives there a couple words.... I feel I'm just as bad for knowing something like that goes on for that dog & I don't say anything nether. I have no support from my partner & he keeps stressing we don't need that where we live nor for the baby... I'm real depressed abput it because I love all living things, & hate when I know someone is being abused.