Dog is stocked with Spake and has good Bass, pike and crappy fishing. It is part of a three lake chain (Dog, Cranberry, Whitefish) with water access to the Town of Seeleys Bay. It is part of the Rideau Canal system with locks at Whitefish (Jones Falls) and Cranberry (Brewers Mills) and as such has unlimited boating potential. Slam dunk in my opinion.
Collins is a smaller lake. Good Bass, pike, muskie and crappy. Has a deep and a shallow end. Great location for anyone working in Ktown. Landlocked and popular.
Loughborough is the land of the rich and famous. Two lakes in one with a deep stocked Lake trout end (good smally fishing) and a shallow bass, pike & crappy end. Careful driving in the shallow end...
It is my least favorite of the three. The trout are small and taste like shite, it's landlocked, extremely popular and land values are high. It's bigger than Collins though.
Call me up when you get a place on Dog