[ths911]

Unfortunately I have dealt with many of rat in the past. Traps with peanut butter work. If you have one rat, you probable have more. Place the traps at different levels of the garage. Floor, workbench, rafters, etc. places where your dogs can't get them. The rats I dealt with seemed to have paths that I tapped into. Home depot has a few different types of traps. I used the good old wood with spring action ones - kills them dead. (watch your fingers). I also added a piece of string on the trap so I could pull it out of its spot, once tripped, without having to get in tight spaces.

Good luck.