In most countries where grey squirrels are an alien species it illegal to release them back into the wild if captured alive. Releasing them in another area is inhumane and may spread diseasses. The Procull squirrel trap is an approved humane dispatch trap made in Britain. It has been designed with both the novice and professional trapper in mind who may be concerned about their ability to quickly and humanely dispatch these animals. The Kania 2000 and approved Fenn traps may also be considered.
In areas where the protected native red squirrels are present, a humane live catch cage trap must be used if grey squirrels are a problem.