Depends on specifics of both pesticides. Read labels, look up products and ingredients, inquire at point of purchase.

Traps are probably the most reliable means of mole control, but I'd worry about leaving a puppy unattended near a set trap. I was told by my vet that Round-up is fairly benign as herbicides go, but even here puppies will probably be more suseptible than full-grown dogs - check with your vet.

Traps are excellent, but you need to crumble loose soil and fill around the trigger. That's a big improvement. Then they fight through, rather than occassional sneaking past.

Cover the area with a lid so rain or irrigation doesn't cement the loose fill.

Learned this from a professional trapper and pesticides class in college.

The moles are eating grubs, worms & other bugs in your yard and flower beds. We use the "Organic caster oil spray" that you can get from "Gardensalive.com" or you my find it at a large nursery in you area. The only thing with it is you have to reapply after it rains. We also use the smoke bombs you place into the holes. Traps have not been successful for us & our dog wouldn't even look at a mole! Maybe our cats would but they are to lazy & havn't learned how to dig into the ground for food.
Good luck mole hunting, it can be really tuff getting rid of them.

That's one thing we don't have to worry about on this island. There are no moles! They haven't figured out a way to burrow through rock. When I lived on the mainland many moons ago it was mole city in my garden. What a mess those pests can make. I would just finish mowing the lawn and they would appear. They loved our good soft soil. Joe

Thanks everyone, I'm just concerned about a puppy digging and finding the pellets....I was wondering how long they might be "potent".

I really appreciate all the mole advice- I will tell my husband- he is on the war-path! I know I will be when I finally get that back garden going!