It is theoretically possible to genetically modify animals to exhibit more aggressive behavior, but in practice there are complex scientific, ethical and legal issues. At the genetic level, behavioral traits are influenced by a combination of factors, including genetic, environmental and neurophysiological factors. Therefore, genetic modification projects that manipulate animal behavior will face great challenges. 1. **Scientific challenges**: Animal aggression is not determined by a single gene, but the result of multiple genes and their interaction with the environment. In addition, there are problems with the predictability and stability of genetic modification, which may lead to unforeseen side effects that affect the health of animals and the balance of the ecosystem. 2. **Ethical issues**: Genetically modified animals for military purposes have caused serious ethical controversy. Animal rights, welfare, and interference with the natural behavior of species are all focal points of ethical discussions. 3. **Laws and regulations**: Many countries have strict laws and regulations on genetic engineering, especially when it comes to biological weapons and military use. Such research may violate international conventions, such as the Biological Weapons Convention, which prohibits the development, production and storage of microbial or other biological agents or toxin weapons. Therefore, although technically feasible, implementing such projects in practice requires overcoming major scientific and ethical obstacles and complying with relevant laws and regulations.