Just for the record, cannabis alone isn't very likely to kill your dog, although it will make them very uncomfortable. And uncontrolled urination is a very common side effect. And I'm going to judge, don't give your pets cannabis. It's abuse.

Also, some sugar free edibles also contain Xylitol, which is always a worry, and shows up in many common things. For example, Trident gum contains 0.17mg in each piece. With an ld50 of 0.1mg/kg a 10kg dog could die from eating 6-7 pieces of gum. Many sugar free peanut butters also contain xylitol.

The moral of the story is keep dangerous things (including cannabis) away from your dogs, and know what stuff is dangerous, since danger can be hiding in many common items.