In Canada, it's important to adhere to wildlife protection laws when pigeon-proofing solar panels. It is legal to use non-lethal methods such as physical barriers like mesh and environmental modifications (trimming trees, removing food and water sources). However, it is illegal to harm or kill pigeons using poisons and avicides. Always check local regulations and consider consulting with a professional to ensure that your pigeon-proofing strategies are humane and comply with Canadian wildlife protection laws.