You can have a bit of fun with the smoker and terriers turbo but to completely eradicate the things you need to be putting bait and/or traps down. Done correctly it would put dogs or kids at risk at all. You really ought to get in a pest controller, look for one who is a member of at least one trade organisition such as npta, ukpco or bpca. Also that they are up to date with qualifications and insurance etc and preferably someone who is willing to guarantee their work.