Gila monsters are pretty slow they don't chase anything. They can be lightning fast when biting but don't run. They would only bite a cat if it was attacking it, although it would eat a litter of kittens left alone. They eat mostly eggs and the young of squirrels, rats, mice, reptiles,and ground nesting birds. 95% of bites on humans by Gila Monsters are alcohol related. The humans had the alcohol not the monsters.