i recently started volunteering at an animal shelter. it offers buckle and martingale collars (although the fit usually isnt great) and slip leads. the dogs are usually very eager to get out of their kennels, and too many times they manage to slip out of their kennels before i manage to fit martingale/buckle collars around their necks. slip leads, however, are quick and easy to put on, as i could put it around the dog's neck just as it tries to poke its head out of its kennel run. however, when i walked a dog that was a puller with a slip lead, the slip lead remained tight she looked like she being choked by the leash. are slip leads a good choice to use? if so, what should the minimum width of the leash be if im walking a medium/big dog (say, a full-grown lab). if not, any tips for quickly putting a leash on or getting into the kennel without the dog escaping between my legs (the dogs are pretty swift when it comes to getting out)?