Poison is really a shitty way to handle this problem. It's not just bad for our dogs, it's bad for wild predators as well, and (speculating) probably not good for the soil microbiome either. Also it's a pretty nasty way to go for the rodents.

The proper way to deal with moles is using blackhole traps. They take advantage of the fact that moles will try to block any light entering their tunnel. The trap has a hole at the end, so when inserted into their tunnel, the moles will want to plug it to turn out the light, when they enter the open end of the tube it springs the trap.

It takes a bit of luck and a bit of skill, sometimes you have to reset the traps multiple times before getting the mole.

I also wouldn't recommend ultrasonic repellers because we don't know what effect that type of shit has on other creatures, either.

Voles are trickier, though also less problematic. I would say get a cat.