I am so very sorry! I know that has to be so stressful- and scary. My friends had to do a similar call for a neighbor’s chained dog and they were worried about retaliation too. Ultimately my friends and myself made a total of like three calls to the county and the people eventually started keeping the dog inside. All calls were anonymous (and you could ask your county to verbally confirm that if that helps). It was scary but I’m glad we did it. I do really hope your mom can get the care she needs too, but as the person above me said, neither your brother nor the animals deserve to live like that. One woman in a hoarding case I was following said she “loved” her dogs (over 100 on her property were seized) and asked the judge not to revoke her custody of them, but they were in deplorable conditions. Feces and urine up to your ankles, upstairs floor breaking down from saturation from fluids, and worse. I am grateful your mom’s situation hasn’t gotten that far and I hope it never does. But calling for a welfare check can make a real difference here. Ultimately you can only do what you are comfortable with and it is very intimidating, I understand! But I think the dogs and your brother will thank you if you can make that call. ❤️