The best way to go is to give "safe-gaurd" which is a powder that you mix in a little bit of wet food (or something like that....I've used beef baby food too, but I only use ~1 tsp to ~1 Tbsp. eyeball...enough to be able to mix it up). It worms them for hookworms, roundworms, whipworms, AND tapeworms (which is something most wormers don't get). You have to give it 3 days in a row (because of the whipworms lifecycle), but it works great!! And it's really affordable too. They have it at Petco but it's a lot higher there....I find it at Atwoods or my local Feed store...much cheaper, and you can find it online for cheaper too. $4.50-$4.95 is what I pay per box ($11.90 at Petco) which is 3 doses of a 1 gram packet. The 1 gram packet is for dogs up to 10 lbs., and since my baby was only 2 lbs. when I started using it (8 wks. old), I called the company to find out about changing the dose. They said to split the packet in half for dogs under 5 lbs., so one box will dose you dog twice if they're under 5 lbs. It's very safe for puppies (over 6 wks. of age) and is so inexpensive and easy to give, it's much better than an expensive vet visit and fecal exam. I declined the fecal exam at Bella's first puppy visit, and the vet wanted to know why. He grilled me about what I was using as a preventative wormer and how I was using it (has to be done 3 days in a row!!), but he was very satisfied with my choice and told me good job! I would recommend using this product since it's so easy! Here's a link to their website which should have any info you need (recommended ages, preventative schedules, etc...) I hope that helps!!
Dog Worms | Eliminate dog worms with Safe-Guard Canine Dewormer | Fenbendazole