This is just one response out of the many you have sent...it's not the whole picture.

If you really feel like responding, give them your sister's email address and tell them to talk to her - or forward that email you got to your sister.

Can she contribute any money to the vet care? She should - if she is feeding them, then she has taken on some responsibility.

Anyway, look at the big picture - there are way more positives than negatives. The most important thing here is Fatty!

If you do contact rescues, ask if they can take Fatty rather than donate money. Rescues are the ones needing donations, as you know.

If nothing else, take them off your email list. They aren't being cruel - just telling their side of the story.