For a small lake like this, the release record is the fishing report. Provincial hatchery records run from 1953 to 2026 and log 31 releases, totalling roughly 115,000 fish.
Brook trout appear only in the historical record: four releases between 1961 and 1970, about 56,000 wild fry sourced from Washington-state and Ontario broodstock, a program that stopped over half a century ago and hasn't resumed.
Rainbow trout carry the deeper and more current history: an early wild Beaver-strain fry program in 1953-54 (about 30,000 fish), a couple of Premier-strain plants in the late 1980s, then a Fraser Valley-strain program that has run almost every year since 2003, growing from a few hundred fish to a steady 1,500 spring catchables annually since 2016.
Those Fraser Valley rainbow go in each spring at 225-240 g, already close to catchable size, which marks Dogsleg as a straightforward put-and-take fishery rather than a put-grow lake: the fish you catch this season are this season's plant, not a cohort left to grow out over a summer.