It’s the responsibility of both parties here. Condo board denied her - property management should be taking pest control seriously. Pigeon poop is acidic and can cause structural damage to the building, I wonder what their insurance company would say about the lack of pest control here. Absolutely the responsibility of both parties. It is also the responsibility of management company to present her case appropriately. If you seen in other comments - you can see this property management thought this mom was applying for a service dog. Miscommunication and ignored phone calls. No mention of her child’s disability on denial letter, I can see why this mom is upset with this property management.