The biggest thing is to do your research on finding a happy balance of what you can afford and quality dog food/treats. Some brands have a history of putting unhealthy fillers (avoid anything that says "by-product"). Or having recalls. If you haven't already found a trusted veterinary clinic as some local friends/family for a referral.
With that being said, our vet recommended Purina Pro Plan dry kibble. Every once in a while I give them canned food mixed in as a treat.
As for treats, I like to give them Greenies (for their dental care). It's cheaper if you can buy in bulk (Costco has the best deal from what I've seen). I like getting Milk Bone mini dog treats because they're tiny, one large box is affordable compared to larger biscuits, and it lasts longer. With 3 dogs food and treats don't last long! Also, remember that there are some fruits and veggies that you can give them as an alternative, and they're usually healthier too.
Do you know which fruits and vegetables dogs are safe for dogs to eat? Fresh, frozen, or canned, learn which fruits and veggies to feed and which to avoid.
www.akc.org
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Finally, for the rawhides and chew bones it depends on your dog's chew strength. We have a light chewer, a strong chewer, and an extreme chewer. The Nylabones in anything but extreme chew level gets broken up, sometimes ingested, and then hopefully pooped out. We do not get antlers anymore because they have broken their teeth on them. Rawhides only when supervised because the big dogs will try to swallow them whole, or steal it from the little dog once they finish theirs.
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PS. Yes, I'm obsessed with our dogs.